so_do_gi/project/timer.h

#ifndef __TIMER_H_
#define __TIMER_H_

class Timer {
private:
    unsigned long prev;
    unsigned long current;
public:
    Timer() {
        current = prev = millis();
    }
    inline void ChkFirst() {
        prev = millis();
    }
    inline void ChkLast() {
        current = millis();
    }

    unsigned long GetSecond() {return (current - prev) / 1000;}
};

#endif