jitter (flashing lights, seizure warning)

WARNING: FLASHING LIGHTS AND PATTERNS, DO NOT PLAY IF YOU HAVE PHOTOSENSITIVE EPILEPSY 

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proof of concept for a jittery sprite effect.

play with the left/right arrow keys.
press escape to close the game window.

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made in GameMaker Studio 1.4, uncommented code included in .gmz file.

sprites/surfaces are drawn using 2d primitive triangle strips, vertexes are randomly placed and offset in a random angle every frame.