Press Space bar in order for your sprites to appear.
Use C to Clear
Use 0 to put the pen down
Use D to put the pen up
Use R to set the pen size to 1
Use m to change pen size by 2
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Use C to Clear
Use 0 to put the pen down
Use D to put the pen up
Use R to set the pen size to 1
Use m to change pen size by 2