- it takes two
Here, the turtle draws a random arc, then moves to the end point, turns 180 degrees and continues with another random arc in the opposite color. This is repeated 300 times, producing a tangled shrubbery appearance.
To New
# set default screen, pen and turtle values
ResetAll SetScreenSize [400 400] HideTurtle
SetSC Black SetPC Green SetPS 1 PenUp
End
To Roam
Make "Angle 30 + Random 210
rArc :Angle :Radius
Forward :Radius Left 180
Make "PenCol 8+Minus :PenCol SetPC :PenCol # yellow/magenta
Wait 2
End
To rArc :Angle :Radius
# clockwise arc drawn relative to turtle heading
Arc :Radius Heading :Angle+Heading Right :Angle
End
To Go
New Wrap
Make "PenCol 2
Make "Radius 30
Repeat 300 [Roam]
End