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For challenges where trigonometry plays an important role.
1
vote
A single pixel moving in a circular path
SpecBAS, 103 bytes
1LET r=SCRh*.75/2,a=0:DO:PLOT INK 3;r*COS a+SCRw/2,r*SIN a+SCRh/2:INC a,TAU/60000:WAIT SCREEN:CLS:LOOP
INK 11 in SpecBAS isn't quite the right colour but it's close. Other than t …