You can install gled from the Arch User Repository (AUR)
$ go build -o gled .
gled solid <color>
gled cycle <rate> <brightness>
gled breathe <color> <rate> <brightness>
gled intro <toggle>
- color - RRGGBB (RGB hex value)
- rate - 100-60000 (Number of milliseconds. Default: 10000ms)
- brightness - 0-100 (Percentage. Default: 100%)
- toggle - on|off
gled -debug <0..3> ...