this iteration tweaks the color values inside of regl.frame()
just a bit, mixing sine and cosine and speeding up the color transition
an es2015 iteration on the block regl-demo from @adamrpearce
mirrored at https://github.com/micahstubbs/regl-experiments/tree/master/03
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<html>
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<meta content='width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0' name='viewport' />
<meta charset=utf-8>
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<script language='javascript' src='https://npmcdn.com/regl/dist/regl.js'></script>
<script src='vis.js'></script>
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https://npmcdn.com/regl/dist/regl.js