I play tetris too (hkgwife)

Race #20343

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Official speed 129.60 wpm (26.76 seconds elapsed during race)
Race Start September 4, 2019 4:17:46am UTC
Race Finish September 4, 2019 4:18:13am UTC
Outcome No win (2 of 3)
Accuracy 99.0%
Points 101.52
Text #4060100 (Length: 289 characters)

There are many other ways of programming the switching sequence, which will not be discussed here. In many cases the switching sequence is under computer control. In the simple method used above, the intention is to show the fundamental principle upon which pulse width modulation is used.