loop.go

func (bt *BlinkyTape) animation(p Pattern, repeat int, delay time.Duration) {
	bt.status = Running

	innerLoop := func() bool {
		select {
		case <-bt.stop:
			return false
		default:
			go bt.playPattern(p, delay)
			<-bt.next
			return true
		}
	}

	if repeat < 0 {
		for {
			if !innerLoop() {
				break
			}
		}
	} else {
		for i := 0; i < repeat; i++ {
			if !innerLoop() {
				break
			}
		}
	}
}