He following program is the simple i/o sample program (ch8) we discussed in class. basically when you push the button, led1 toggles, and when you release it, led2 toggles. modify the program, so that at the push of the button, the micro cycles through 4 different as follows: 1- led1 flashes while led2 off2- led2 flashes while led1 off3- led1 and led2 flash simultaneously4- led1 and led2 flash alternativelyhint: use a counting semaphore to cycle through 4 different values, each of which corresponds to the four different modes, see the other sample code for flasher with multiple speeds.#include #include "msp430g2553.h"int sw2=0; int main(void){wdtctl = wdtpw | wdthold; //stop watchdog timerp1dir = 0x00; //port 1 all inputsp1dir |= (bit0 | bit6); //set p1.0 and p1.6 as outputs (led1, led2)p1ren |= bit3; //activate resister on p1.3p1out |= bit3; //make it pull up because sw2 is active lowfor (; ; ){sw2 = p1in; //read values from p1sw2 & = bit3; //mask out only bit3 wheresw2 is connectedif (sw2 == bit3){ //if sw2 is highp1out & = ~bit6; //turn led2 offp1out ^= bit0; //toggleled1 __delay_cycles(5); //delay 50,000 micro seconds}else{ //else (sw2 is low)p1out & = ~bit0; //turn led1 offp1out ^= bit6; //toggle led2__delay_cycles(2); //delay 200,000 micro seconds}}// end of infinite loop}//end of main