let leftImg = document.querySelector('.left-img')
		let theImg = document.querySelector('.the-img')
		let rightImg = document.querySelector('.right-img')

		let theIndex = 0
		theImg.src = arr[theIndex]
		leftImg.src = arr[arr.length - 1]
		rightImg.src = arr[1]

		let offset = 1000
		imgs.style.left = `-${offset}px`

		let isDone = true


		function refresh(sign) {
			if(sign === '+') {
				theIndex++
				if(theIndex === arr.length)
					theIndex = 0
			} else if(sign === '-') {
				theIndex--
				if(theIn