namespace lab2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        private int x1, y1, x2, y2;
        private double fi, t, cos, sin;
        private Pen pen = new Pen(Color.DarkRed, 2);
        private void Dec_list_Load(object sender, EventArgs e)
        {
            timer1.Enabled = true;
            x1 = this.Width / 2;
            y1 = this.Height / 2;
            t = Math.Tan(fi);
            sin = Math.Sin(fi);
            cos = Math.Cos(fi);
            fi += 0.01;
            x2 = 20*(cos(t)+cos(5*t)/5);
            y2 = 20 * (sin(t) - sin(5 * t) / 5);
        }
 
            private void Dec_list_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            g.DrawEllipse(pen, x2, y2, 20, 20); 
        }
            private void timer1_Tick(object sender, EventArgs e)
            {
                fi += 0.01;
                t = Math.Tan(fi);
                sin = Math.Sin(fi);
                cos = Math.Cos(fi);
                x2 = 20*(sin(t)-sin(5 * t)/5);
                y2 = 20*(sin(t)-sin(5*t)/5);
                Invalidate();
 
            }
           } 
 
        }