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for (int i = 0; i < 00; i++)
{
if (i % 2 == 0)
{
this.Left = this.Left + 5;
this.Top = this.Top + 5;
}
else
{
this.Left = this.Left - 5;
this.Top = this.Top - 5;
}
System.Threading.Thread.Sleep(20);
}