JS每日一题：经典面试题-循环打印红绿灯

      function delay(time) {

        return new Promise((resolve) => setTimeout(resolve, time))

      }

      const light = async () => {

        console.log('红灯')

        await delay(3000)

        console.log('绿灯')

        await delay(5000)

        console.log('黄灯')

        await delay(2000)

        light()

      }