getData(a, b, function(err, rlt) {
    if (err) {
        console.log(err)
    } else {
        // call next function after 35 seconds
        settimeout(getData(c, d, function(err, rlt) {
            if (err) {
                console.log(err)
            } else {
                // call next function after 10 seconds
                settimeout(getData(x, y, function(err, rlt) {
                    if (err) {
                        console.log(err)
                    } else {
                        console.log(rlt);
                    }
                }), 10000);
            }
        }), 35000)
    }
});


function getData(parms1, parms2;, callback) {
    return parms1 + parms2;
}