One Led

ONE LED
#include "mbed.h"
#define T 20
DigitalOut led(PTC0);

int main()
{
    int T1 = 6;
    while (true) {
        for(int i=0; i<T; i++){
            if(i==T1)
                led = true;
            if(i==T)
                led = false;

        }
        led = true; // toggle led
        wait_ms(1);
    }


}