const EASY = 0;
const NORMAL = 1;
const HARD = 2;

let life = {
    difficulty: EASY,
    live: () => (life.difficulty = HARD)
};

async function main() {
    life.live();
    if (life.difficulty == HARD) {
        adapt().then(overcome);
    }
}

async function adapt() {
    console.log("adapt");
}

function overcome() {
    console.log("overcome");
}

main();