Flickering Flame

There are all kinds of ways to make a sequence look like fire. That’s good, because there are all kinds of fires. We listed one in the tutorial on fades. Here is another:

We imagine a tongue of fire growing in size and brightness as it rises. Then it dissipates faster.

//flickering flame
//climbs at moderate speed
//dissipates faster, say twice as fast as it climbs

@0ms  
flameDrop
           chn1 = fade to 15% within 120ms
@40ms                                      //may interrupt fade and reverse
           Go To flameDrop with 30% chance  
flameRise
           chn1 = fade to 100% within 300ms
@100ms                                    //may interrupt fade and reverse
           Go To flameRise with 50% chance