SOURCE CODE

[Likechaitanya12]

//First of all, we define the pins where we have //connected the LEDs. int red_1=13; int yellow_1=12; int green_1=11; int red_2=10; int yellow_2=9; int green_2=8; int red_3=7; int yellow_3=6; int green_3=5; int red_4=4; int yellow_4=3; int green_4=2;

void direction_1_green(void)//green LED of direction 1 will turn ON
{digitalWrite(red_1,LOW); digitalWrite, (yellow_1,LOW); digitalWrite,(green_1,HIGH); digitalWrite(red_2,HIGH); digitalWrite, (yellow_2,LOW); digitalWrite,(green_2,LOW); digitalWrite(red_3,HIGH); digitalWrite, (yellow_3,LOW); digitalWrite,(green_3,LOW); digitalWrite(red_4,HIGH); digitalWrite, (yellow_4,LOW); digitalWrite,(green_4,LOW); }

void direction_2_yellow(void)//yellow LED of direction 2 will turn ON {digitalWrite(red_1,HIGH); digitalWrite(yellow_1,LOW); digitalWrite(green_1,LOW); digitalWrite(red_2,LOW); digitalWrite(yellow_2,HIGH); digitalWrite(green_2,LOW); digitalWrite(red_3,HIGH); digitalWrite(yellow_3,LOW); digitalWrite(green_3,LOW); digitalWrite(red_4,HIGH); digitalWrite(yellow_4,LOW); digitalWrite(green_4,LOW); }

void direction_2_green(void)//green LED of direction 2 will turn ON {digitalWrite(red_1,HIGH); digitalWrite(yellow_1,LOW); digitalWrite(green_1,LOW); digitalWrite(red_2,LOW); digitalWrite(yellow_2,LOW); digitalWrite(green_2,HIGH); digitalWrite(red_3,HIGH); digitalWrite(yellow_3,LOW); digitalWrite(green_3,LOW); digitalWrite(red_4,HIGH); digitalWrite(yellow_4,LOW); digitalWrite(green_4,LOW); }

void direction_3_yellow(void)//yellow LED of direction 3 will turn ON
{digitalWrite(red_1,HIGH); digitalWrite(yellow_1,LOW); digitalWrite(green_1,LOW); digitalWrite(red_2,HIGH); digitalWrite(yellow_2,LOW); digitalWrite(green_2,LOW); digitalWrite(red_3,LOW); digitalWrite(yellow_3,HIGH); digitalWrite(green_3,LOW); digitalWrite(red_4,HIGH); digitalWrite(yellow_4,LOW); digitalWrite(green_4,LOW); }

void direction_3_green(void)//green LED of direction 3 will turn ON {digitalWrite(red_1,HIGH); digitalWrite(yellow_1,LOW); digitalWrite(green_1,LOW); digitalWrite(red_2,HIGH); digitalWrite(yellow_2,LOW); digitalWrite(green_2,LOW); digitalWrite(red_3,LOW); digitalWrite(yellow_3,LOW); digitalWrite(green_3,HIGH); digitalWrite(red_4,HIGH); digitalWrite(yellow_4,LOW); digitalWrite(green_4,LOW); }

void direction_4_yellow(void)//yellow LED of direction 4 will turn ON {digitalWrite(red_1,HIGH); digitalWrite(yellow_1,LOW); digitalWrite(green_1,LOW); digitalWrite(red_2,HIGH); digitalWrite(yellow_2,LOW); digitalWrite(green_2,LOW); digitalWrite(red_3,HIGH); digitalWrite(yellow_3,LOW); digitalWrite(green_3,LOW); digitalWrite(red_4,LOW); digitalWrite(yellow_4,HIGH); digitalWrite(green_4,LOW); }

void direction_4_green(void)//green LED of direction 4 will turn ON {digitalWrite(red_1,HIGH); digitalWrite(yellow_1,LOW); digitalWrite(green_1,LOW); digitalWrite(red_2,HIGH); digitalWrite(yellow_2,LOW); digitalWrite(green_2,LOW); digitalWrite(red_3,HIGH); digitalWrite(yellow_3,LOW); digitalWrite(green_3,LOW); digitalWrite(red_4,LOW); digitalWrite(yellow_4,LOW); digitalWrite(green_4,HIGH); }

void direction_1_yellow(void)//yellow LED of direction 1 will turn ON {digitalWrite(red_1,LOW); digitalWrite(yellow_1,HIGH); digitalWrite(green_1,LOW); digitalWrite(red_2,HIGH); digitalWrite(yellow_2,LOW); digitalWrite(green_2,LOW); digitalWrite(red_3,HIGH); digitalWrite(yellow_3,LOW); digitalWrite(green_3,LOW); digitalWrite(red_4,HIGH); digitalWrite(yellow_4,LOW); digitalWrite(green_4,LOW); } void setup() { // Declaring all the LED's as output

for(int i=2;i<=13;i++) pinMode(i,OUTPUT); } void loop() //In the loop function, we controlled the signal one // by one to control the flow of traffic. {direction_1_green(); delay(5000); direction_2_yellow(); delay(3000); direction_2_green(); delay(5000); direction_3_yellow(); delay(3000); direction_3_green(); delay(5000); direction_4_yellow(); delay(3000); direction_4_green(); delay(5000); direction_1_yellow(); delay(3000); }