class Network {
    constructor() { }

    async sleep(ms) {
        return new Promise(resolve => setTimeout(resolve, ms));
    }
    async task1() {
        console.log("World.")
        let val = true
        while (val) {
            await this.sleep(1000); 
            console.log("Task1 doing work.")
        }
        //throw Error("Ded World.")
    }

    async task2() {
        console.log("Hello.")
        let val = true 
        while (val) {
            await this.sleep(1000); 
            console.log("Task2 doing work.")
        }
        //throw Error("Ded Hello.")
    }
}

const network = new Network() 

async function main() {
    network.task1()
    network.task2()
}

main()