mbed : mbed programming is very fun.

#include "mbed.h"

DigitalOut myled[]= { LED1, LED2, LED3, LED4 };

int main() {
    int i;
   
    while(1) {
        for( i=0; i<4; i++) {
            myled[i] = !myled[i];
           
        wait(0.5);
       }
    }
}

mbed programming is very fun.