//i/o
int gmain=3; //Green light main
int ymain=4; //Yellow light main
int rmain=5; //Red light main
int gside=7; //green light side
int yside=8; //yellow light side
int rside=9; //red light side
int lwalk=11; //good to walk like
int bwalk=12; //the button

//Variables
int walk = 0; //used to store info on if button has been pressed
int val = 0;
int walkmode = 0; //used for different modes of walk light

void setup() {
  // put your setup code here, to run once:
pinMode(gmain,OUTPUT);
pinMode(ymain,OUTPUT);
pinMode(rmain,OUTPUT);
pinMode(gside,OUTPUT);
pinMode(yside,OUTPUT);
pinMode(rside,OUTPUT);
pinMode(lwalk,OUTPUT);
pinMode(bwalk,INPUT);
}


void loop() {

main:
ButtonCheck();

digitalWrite(gmain,LOW);//all red lights
digitalWrite(ymain,LOW);
digitalWrite(rmain,HIGH);
digitalWrite(gside,LOW);
digitalWrite(yside,LOW);
digitalWrite(rside,HIGH);
//int walkmode=0;

delay (500);

ButtonCheck();
digitalWrite(rmain,LOW);//red to green
digitalWrite(gmain,HIGH);

delay(3000);

ButtonCheck();
digitalWrite(gmain,LOW);//green to yellow
digitalWrite(ymain,HIGH);

delay(1000);


if (walk == 1){
goto cross;
}
else if (walk == 0){
goto nocross;
}
else{digitalWrite(gmain,HIGH);//all on indicating error
digitalWrite(ymain,HIGH);
digitalWrite(rmain,HIGH);
digitalWrite(gside,HIGH);
digitalWrite(yside,HIGH);
digitalWrite(rside,HIGH);
}


nocross:

ButtonCheck();
digitalWrite(gmain,LOW);//all red lights
digitalWrite(ymain,LOW);
digitalWrite(rmain,HIGH);
digitalWrite(gside,LOW);
digitalWrite(yside,LOW);
digitalWrite(rside,HIGH);
walkmode=0;

delay (500);

ButtonCheck();
digitalWrite(rside,LOW);//red to green
digitalWrite(gside,HIGH);

delay(1500);

ButtonCheck();
digitalWrite(gside,LOW);//green to yellow
digitalWrite(yside,HIGH);

delay(700);

goto main;


cross:

digitalWrite(gmain,LOW);//all red lights
digitalWrite(ymain,LOW);
digitalWrite(rmain,HIGH);
digitalWrite(gside,LOW);
digitalWrite(yside,LOW);
digitalWrite(rside,HIGH);
//walkmode=0;



delay (500);

digitalWrite(rside,LOW);//red to green
digitalWrite(gside,HIGH);
int (walkmode=1);
//walkmode=0;
digitalWrite(lwalk,HIGH);

delay(3000);

digitalWrite(gside,LOW);//green to yellow
digitalWrite(yside,HIGH);
//int (walkmode=2);

delay(1000);
digitalWrite(lwalk,LOW);

walk = 0;
val = LOW;
delay (10);

goto main;
}

void ButtonCheck()
{
val = digitalRead (bwalk);
while (val == HIGH){
walk = 1;
break;
}
}

/*
void walksignal(){
  //different walk modes
if (walkmode=0){
  digitalWrite(lwalk,LOW);
}
else if (walkmode=1){
  digitalWrite(lwalk,HIGH);
}
else if (walkmode=2){
  digitalWrite(lwalk,HIGH);
  delay (100);
  digitalWrite(lwalk,LOW);
  delay (100);
}
  else{
digitalWrite(gmain,HIGH);//all red lights
digitalWrite(ymain,HIGH);
digitalWrite(rmain,HIGH);
digitalWrite(gside,HIGH);
digitalWrite(yside,HIGH);
digitalWrite(rside,HIGH);
}
}
*/