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rem Moving Squares thanks to Joel Kahn
clg
x1=150
y1=150
q=0.055
m=0.0
SquaresLoop:
m=m+q
x1=x1+4.0*cos(m)
y1=y1+4.0*sin(m)
x2=300-x1
y2=300-y1
x3=x1/2.0
y3=y1/2.0
x4=300-x3
y4=300-y3
color purple
line x1,y1,x2,y1
color orange
line x1,y1,x1,y2
color darkpurple
line x1,y2,x2,y2
color darkorange
line x2,y1,x2,y2
color blue
line x3,y3,x1,y1
color darkblue
line x2,y2,x4,y4
color cyan
line x3,y4,x1,y2
color darkcyan
line x2,y1,x4,y3
color green
line x3,y3,x3,y4
color red
line x3,y3,x4,y3
color darkgreen
line x4,y3,x4,y4
color darkred
line x3,y4,x4,y4
goto SquaresLoop
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