code every day with me

function kangaroo(x1, v1, x2, v2) {    while(x1 >= 0){        //if they in same position         if(x1==x2) return 'YES';        //caculate the distance of 2 kangaroo        let distance = Math.abs(x1-x2);        //kangaroo 1 move        x1+=v1;        //kangaroo 2 move        x2+=v2;        //if the distance between 2 kangaroo longer or no change, they will never meet        if(Math.abs(x1-x2)>=distance) return 'NO';    }}