rgb随机颜色函数
let randcolor = () => { let r = 100 + ~~(Math.random() * 100); let g = 135 + ~~(Math.random() * 100); let b = 100 + ~~(Math.random() * 100); return 'rgb(${r}, ${g}, ${b})' }
let randcolor = () => { let r = 100 + ~~(Math.random() * 100); let g = 135 + ~~(Math.random() * 100); let b = 100 + ~~(Math.random() * 100); return 'rgb(${r}, ${g}, ${b})' }