Wavedrom

```kroki {_type=wavedrom}

{ signal: [ 
  { name: "clk",         wave: "p.....|..." },
  { name: "Data",        wave: "x.345x|=.x", data: ["head", "guts", "tail", "data"] },
  { name: "Request",     wave: "0.1..0|1.0" },
  {},
  { name: "Acknowledge", wave: "1.....|01." }
]} 
```