RosettaCodeData/Task/Animation/M2000-Interpreter/animation-2.m2000

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Module UseEvery {
Window 16, 6000,4000;
Print "Animation"
Def boolean direction=True
rotating$ =lambda$ a$="Hello World! " (direction as boolean)->{
=a$
a$=if$(direction->right$(a$,1)+mid$(a$,1, len(a$)-1), mid$(a$,2)+left$(a$,1))
}
Every 200 {
Cls #225577,1
Print @(2,height/2),rotating$(direction)
if mouse=1 then direction~
if mouse=2 then exit
}
}
UseEvery