echo.js

"use strict"

/**
 * Executes functions sequentially.
 *
 * @param {function[]} arguments - Functions to execute.
 * @returns {void}
 */
function flow() {
    if (arguments.length === 0) {
        return
    }

    const head = arguments[0]
    const rest = [].slice.call(arguments, 1)

    head()
    setTimeout(() => {
        flow.apply(null, rest)
    }, 33)
}

const text = String(process.argv[2])
flow(
    () => {
        process.stdout.write(text)
    },
    () => {
        process.stdout.write(`${text}\n`)
    },
    () => {
        process.stdout.write(`${text}\n${text}`)
    },
    () => {
        process.stdout.write(`${text}\n${text}\n`)
    },
    () => {
        process.stdout.write(`${text}\n${text}\n${text}\n${text}\n`)
    },
    () => {
        process.stdout.write(`\n${text}\n${text}`)
    },
    () => {
        process.stdout.write(`${text}\n\n\n`)
    },
    () => {
        process.stdout.write(`\n${text}`)
    }
)