func dance(pin gpio.Pin, ctrlChan chan bool) {
enabled := false
for {
select {
case val := <-ctrlChan:
fmt.Printf("dancing? %+v\n", val)
enabled = val
default:
if enabled {
pin.Set()
time.Sleep(500 * time.Millisecond)
pin.Clear()
time.Sleep(500 * time.Millisecond)
}
}
}
}
