piecewise

[sriniv1422]

hello ;
I tried using the piecewise to draw some analog waveforms . In the ex code listed on the web ;
{signal: [
{name: 'clock', wave: 'p...'},
{name: 'A1', wave: ['pw', {d: ['M',0,0, 'L',1,1, 'L',2,1, 'L',3,0, 'H',4]}]}
]}

the first signal is the clock.

How can i obtain the waveform that starts with A1 instead of the clock.
When i delete clock, this code does not work. How do i get around this?