gistfile1.txt

class BlinkManager {
    constructor(displayObj, changeFunc1, changeFunc2, changeFuncEnd, rate, duration){
        this.displayObj = displayObj;
        this.changeFuncEnd = changeFuncEnd;
        this.duration = duration;
        this.rate = rate;
        this.blinkCount = 0;
        this.totalCount = 0;
        this.last = changeFunc2;
        this.next = changeFunc1;
        this.complete = false;
    }

    tick(){
        if(this.totalCount >= this.duration){
            this.changeFuncEnd.call(this.displayObj);
            this.complete = true;
        } else {
            let game = this.displayObj.game;
            let elapsed = game.time.elapsedMS;
            
            this.blinkCount += elapsed;
            this.totalCount += elapsed;

            if(this.blinkCount >= this.rate){
                this.blinkCount = this.blinkCount % this.rate;
                this.next.call(this.displayObj);
                this.last = [this.next, this.next = this.last][0];
            }
        }
    }

    isComplete(){
        return this.complete;
    }
}