soda machine

#include <msp430.h>
#pragma vector = PORT1_VECTOR

void if_first_button_is_pressed(void){
    P1OUT |= 1<<1;
    __delay_cycles(4000000);
    P1OUT &= ~(1<<1);
}

void if_second_button_is_pressed(void){
    P2OUT |= 1<<4;
    __delay_cycles(4000000);
    P2OUT &= ~(1<<4);
}

void if_third_button_is_pressed(void){
    P1OUT |= 1<<5;
    __delay_cycles(4000000);
    P1OUT &= ~(1<<5);
}

void if_fourth_button_is_pressed(void){
    P2OUT |= 1<<1;
    __delay_cycles(4000000);
    P2OUT &= ~(1<<1);
}



int main(void){


    WDTCTL = WDTPW | WDTHOLD;   // stop watchdog timer
    DCOCTL = 0;
    BCSCTL1 = CALBC1_1MHZ;
    DCOCTL = CALDCO_1MHZ;

    P1DIR &= ~1; //button 1
    P1DIR |= 1<<1; //motor pin  1

    P1DIR &= ~(1); // pull down resistor button 1
    P1REN |= 1;
    P1OUT &= ~(1);

    P2DIR &= ~(1<<3); //button 2
    P2DIR |= 1<<4; // motor pin 2

    P2DIR &= ~(1<<3); // pull down resistor button 2
    P2REN |= 1<<3;
    P2OUT &= ~(1<<3);

    P1DIR &= ~(1<<4); //button 3
    P1DIR |= 1<<5; // motor pin 3

    P1DIR &= ~(1<<4); // pull down resistor button 3
    P1REN |= 1<<4;
    P1OUT &= ~(1<<4);

    P2DIR &= ~1; //button 4
    P2DIR |= 1<<1; //motor pin 4

    P2DIR &= ~1; // pull down resistor button 4
    P2REN |= 1;
    P2OUT &= ~1;


    while(1){
        if((P1IN & 1) == 1){
            if_first_button_is_pressed();
        }else if((P1IN & 1) == 0){
            P1OUT &= ~(1<<1);
        }if((P2IN & 1<<3) == 1){
            if_second_button_is_pressed();
        }else if((P2IN & 1<<3) == 0){
            P2OUT &= ~(1<<4);
        }if((P1IN & 1<<4) == 1){
            if_third_button_is_pressed();
        }else if((P1IN & 1<<4) == 0){
            P1OUT &= ~(1<<5);
        }if((P2IN & 1) ==1){
            if_fourth_button_is_pressed();
        }else if((P2IN & 1) == 0){
            P2OUT &= ~(1<<1);
        }
    }


    return 0;
}