interrupts

int main () 
{
    timer_1.start();
    timer_2.start();

    while(){
        if(timer_1.read_ms()>=200){
            task_1();
            timer_1.reset();
        }
        if(timer_2.read_ms()>=1000){
            task_2();
            timer_2.reset();
        }
    }
}

void task_1(){
    // do something
}

void task_2(){
    // do something
}