npm install -g wavedrom-cli ; wavedrom-cli -i wave_1.json -s wave_1.svg
```wavedrom {signal: [ {name: 'clk_in', wave: '.P...',period: 1 , node: ' abcd'}, {name: 'clk_out', wave: ' P...',period: 2 , node: ' efgh'}, ], edge: [ 'a~e', 'b~f', 'c~g', 'd~h', 'e~>f', 'f->g', 'g-~>h', 'h~>i some text', 'h~->j' ] }