User-reported unhelpful error message

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Program: https://code.world/haskell#PKfVS3_mxbITZVNHtDtjp4Q

Message:

program.hs:(12,1)-(13,73): error:
    Couldn't match type ‘[(Color, Double)]’ with ‘(Color, Double)’
    Expected type: (Color, Double) -> [Picture]
      Actual type: [(Color, Double)] -> [Picture]