Нужно добавить движение для двух танков только по оси x на С#

namespace Ballistika
{
    public partial class Form1 : Form
    {
        int x_fly = 0, y_fly = 0;
        int x_st = 0, y_st = 0,  def1=0,def2=0;
        int c_m = 0, fl_im=1, gamer=0, angle =0, n_sh=0, mas_kern=0, c1=0,c2=0;
        double V0 = 165;
        Random rnd = new Random();
        string[] type_kern ={"бронебойный", "легкий", "коммулятивный", "разрывной", "реактивный", "болванка"};
        int[] stac1 = new int [8];
        int[] stac2 = new int[8];
        int[,] stat_kern = { {3, 25}, {2, 20}, {6,25}, {3, 38}, {6, 32}, {1, 20}};
        public Form1()
        {
            InitializeComponent();
            this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);
            label1.Parent = pictureBox1;
            label1.BackColor = Color.Transparent;
            label2.Parent = pictureBox1;
            label2.BackColor = Color.Transparent;
            label3.Parent = pictureBox1;
            label3.BackColor = Color.Transparent;
            label4.Parent = pictureBox4;
            label4.BackColor = Color.Transparent;
            label5.Parent = pictureBox4;
            label5.BackColor = Color.Transparent;
            label6.Parent = pictureBox4;
            label6.BackColor = Color.Transparent;
            for (int i = 0; i < 8; i++)
            {
                int id = rnd.Next(5);
                StacG1.Items.Add(type_kern[id]);
                stac1[i] = id;
                id = rnd.Next(5);
                StacG2.Items.Add(type_kern[id]);
                stac2[i] = id;
            }
                gamer = 1;
                c1 = 8;
                c2 = 8;
        }
        public int GetIndexKernel(string n)
        {
            return Array.IndexOf(type_kern, n);
        }
        public int Y_change(int Xf, int angle, double Vf)
        {
            return (int)Math.Floor(Math.Tan((Math.PI * angle) / 180) * Xf - (9.8 / (2 * Vf * Vf * Math.Cos((Math.PI * angle) / 180) * Math.Cos((Math.PI * angle) / 180))) * Xf * Xf);
        }
        public int GetLengthShot(double Vf, int angle)
        {
            return (int) Math.Floor(V0*V0*Math.Sin(2*(Math.PI*angle)/180)/9.8);
        }
       
 
        private void pictureBox1_Click(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (c1 == 0)
            {
                MessageBox.Show("Заряды закончились");
            }
            if (def1!=0)
            {
                StacG1.Items.Remove(StacG1.SelectedItem);
                StacG1.SelectedIndex = -1;
                x_st = 110;
                y_st = 455;
                x_fly = 0;
                angle = (int)UgG1.Value;
                V0 = (double)FG1.Value * 5 / mas_kern;
                gamer = 2;
                n_sh = 1;
                pictureBox3.Load(@"br.png");
                button1.Visible = false;
                button2.Visible = true;
                //y_fly = 455;
                fl_im = 1;
                c_m = 0;
                lb_bullet.Location = new Point(x_fly + x_st, y_st);
                Protocol.AppendText("Выстрел- Танк1" + Environment.NewLine);
                Protocol.AppendText("Дальность: " + GetLengthShot(V0, angle).ToString() + Environment.NewLine);
                c1--;
                lb_bullet.Visible = true;
                tmr_fly.Enabled = true;
            }
        }

        private void tmr_fly_Tick(object sender, EventArgs e)
        {
            y_fly = -(Y_change(x_fly, angle, V0));
            if ((y_fly + y_st > 428) && (n_sh * x_fly + x_st >= 385) && (n_sh * x_fly + x_st <= 415)) 
            { 
                tmr_fly.Enabled = false;
                pictureBox3.Load(@"brf.png");
                //MessageBox.Show("Boobooch!!!");
            }
            if ((n_sh * x_fly + x_st > 800) || (n_sh * x_fly + x_st < 0))
            {
                
                tmr_fly.Enabled = false;
                //MessageBox.Show("Boobooch!!!");
            }
            if (y_fly + y_st > 510)
            {
                if ((n_sh*x_fly + x_st)>10 && (n_sh*x_fly + x_st)<115)
                {
                    if (HPL.Value <= def2)
                    {
                        HPL.Value = 0;
                        Protocol.AppendText("Победил Танк2!!!" + Environment.NewLine);
                    }
                    else
                        HPL.Value -= def2;
                    targPl.Enabled = true; 
                }
                if ((n_sh*x_fly + x_st)>665 && (n_sh*x_fly + x_st)<770)
                {
                    if (HPR.Value <= def1)
                    {
                        HPR.Value = 0;
                        Protocol.AppendText("Победил Танк1!!!" + Environment.NewLine);
                    }
                    else
                        HPR.Value -= def1;
                    targPl.Enabled =true;
                }
                def1 = 0;
                def2 = 0;
                tmr_fly.Enabled = false;
            }


            lb_bullet.Location = new Point(n_sh*x_fly + x_st, y_fly + y_st);
            x_fly+=5;
        }

        private void targPl_Tick(object sender, EventArgs e)
        {
            tmr_fly.Enabled = false;
            if (gamer == 2)
            {
                if (fl_im == 1)
                {
                    tankG2.Load(@"targR.png");
                    fl_im = 2;
                }
                else
                {
                    tankG2.Load(@"TR.png");
                    fl_im = 1;
                }
            }
            if (gamer == 1)
            {
                if (fl_im == 1)
                {
                    tankG1.Load(@"targL.png");
                    fl_im = 2;
                }
                else
                {
                    tankG1.Load(@"TL.png");
                    fl_im = 1;
                }
            }
            c_m++;
            if (c_m == 8)
            { targPl.Enabled = false; }
        }

        private void button2_Click(object sender, EventArgs e)
        {

               if (c2 == 0)
            {
                MessageBox.Show("Заряды закончились");
            }
               if (def2!= 0)
               {
                   StacG2.Items.Remove(StacG2.SelectedItem);
                   StacG2.SelectedIndex = -1;
                   angle = (int)UgG2.Value;
                   V0 = (double)FG2.Value * 5 / mas_kern;
                   x_fly = 0;
                   x_st = 660;
                   y_st = 455;
                   n_sh = -1;
                   gamer = 1;
                   Protocol.AppendText("Выстрел- Танк2" + Environment.NewLine);
                   Protocol.AppendText("Дальность: " + GetLengthShot(V0, angle).ToString() + Environment.NewLine);
                   pictureBox3.Load(@"br.png");
                   button2.Visible = false;
                   button1.Visible = true;
                   //y_fly = 455;
                   fl_im = 1;
                   c_m = 0;
                   lb_bullet.Location = new Point(x_st, y_st);
                   c2--;
                   lb_bullet.Visible = true;
                   tmr_fly.Enabled = true;
               }
        }

        private void label5_Click(object sender, EventArgs e)
        {

        }

        private void StacG1_SelectedIndexChanged(object sender, EventArgs e)
        {
            
           
        }

        private void StacG2_SelectedIndexChanged(object sender, EventArgs e)
        {
            
            
        }

        private void StacG1_SelectionChangeCommitted(object sender, EventArgs e)
        {
            if (StacG2.SelectedItem != "")
            {
                int i = GetIndexKernel(StacG1.SelectedItem.ToString());
                def1 = stat_kern[i, 0];
                mas_kern = stat_kern[i, 1];
                Protocol.AppendText("Снаряд: " + StacG1.SelectedItem + " def=" + def1.ToString() + " mas=" + mas_kern.ToString() + Environment.NewLine);
            }
        }

        private void StacG2_SelectionChangeCommitted(object sender, EventArgs e)
        {
            if (StacG2.SelectedItem != "")
            {
                int i = GetIndexKernel(StacG2.SelectedItem.ToString());
                def2 = stat_kern[i, 0];
                mas_kern = stat_kern[i, 1];
                Protocol.AppendText("Снаряд: " + StacG2.SelectedItem + " def=" + def2.ToString() + " mas=" + mas_kern.ToString() + Environment.NewLine);
            }
        }

        private void выходToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void новаяToolStripMenuItem1_Click(object sender, EventArgs e)
        {
            StacG1.Items.Clear();
            StacG2.Items.Clear();
            Protocol.Clear();
            HPR.Value = 10;
            HPL.Value = 10;
            button1.Visible = true;
            button2.Visible = false;
            for (int i = 0; i < 8; i++)
            {
                int id = rnd.Next(5);
                StacG1.Items.Add(type_kern[id]);
                stac1[i] = id;
                id = rnd.Next(5);
                StacG2.Items.Add(type_kern[id]);
                stac2[i] = id;
            }
            gamer = 1;
            c1 = 8;
            c2 = 8;
        }
    }
}```

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