require 'tk' root = TkRoot.new $canvas = TkCanvas.new(root) { width 360 height 60 } $canvas.pack colors = ['00', '33', '66', '99', 'cc', 'ff'] d = 10 for i in 0..5 for j in 0..5 for k in 0..5 c = '#' + colors[i] + colors[j] + colors[k] x =…
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