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I wanted a relaxing project after yesterday. Implementation was a bit trickier than expected but inspired by tracking pixels (used by web ads), I made a very small dot sprite to track what colour was beneath the top left edge of the bubble. Background inspired by every child's MS Paint creation 1985-2017. Learned: * Can use a global variable as a proxy for broadcasting a variable * Eyedropper tool is useful for matching colours * Used bounce block for first time * Found a non ad use for tracking pixels!
