int io7 = 7;
int io8 = 8;
int io9 = 9;
int io10 = 10;
int GREEN_LED = 11;
int YELLOW_LED = 12;
int RED_LED = 13;

void setup ()
{
 pinMode (io7, INPUT);
 pinMode (io8, INPUT);
 pinMode (io9, INPUT);
 pinMode (io10, INPUT);
 pinMode (GREEN_LED, OUTPUT);
 pinMode (YELLOW_LED, OUTPUT);
 pinMode (RED_LED, OUTPUT);
}

void loop()
{
 int INP_7 = digitalRead (io7);
 int INP_8 = digitalRead (io8);
 int INP_9 = digitalRead (io9);
 int BUTTON = digitalRead (io10);

 if (BUTTON == 0 && (INP_9 == 0 && INP_8 == 0 && INP_7 == 0))
 {
   digitalWrite(RED_LED, 1);
   delay (1000);
 }
 else if (BUTTON == 0 && (INP_9 == 1 && INP_8 == 0 && INP_7 == 0))
 {
   digitalWrite(YELLOW_LED, 1);
   delay (1000);
 }
 else if (BUTTON == 0 && (INP_9 == 1 && INP_8 == 1 && INP_7 == 0))
 {
   digitalWrite(GREEN_LED, 1);
   delay (1000);
 }
 else if (BUTTON == 0 && (INP_9 == 1 && INP_8 == 1 && INP_7 == 1))
 {
   digitalWrite(RED_LED, 0);
   delay (300);
   digitalWrite(YELLOW_LED, 0);
   delay (300);
   digitalWrite(GREEN_LED…