Mouse angles ***

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ClsColor 0,30,0 
While Not KeyHit(1) 
 Cls 
 a#=ATan2(MouseX()-b\x, MouseY()-b\y) 
 Line b\x, b\y, b\x+Cos(a)*10, b\y+Sin(a)*10
 Oval b\x-5,b\y-5,10,10,True 
 Flip 
Wend