Series of dots to form a wave! +是增加數值(increase) ，-是減少數值(decrease) 波長 λ (波速定為1，改變波長即改變週期與頻率) → +(increase) ← -(decrease) Arrow keys are also working 振幅 A (距離，無負數) ↑+ ↓- Arrow keys are also working
