/* Buggy: Use button 12 to turn on more of your circle LEDs and button 11 to turn them off one at a time. */ int pressCount = 0; //Variable to keep track of which LEDs are on and off void setup(){ pinMode(11,INPUT_PULLUP); //buttons pinMode(12,INPUT_PULLUP); pinMode(3,OUTPUT); //LEDs pinMode(4,OUTPUT); pinMode(5,OUTPUT); pinMode(6,OUTPUT); } void loop(){ if(digitalRead(12)==LOW){ //if button 12 pressed, increase PressCount variable by 1 pressCount++; delay(25); //delay 250 milliseconds so a single press doesn't count multiple times } if(digitalRead(11)==LOW){ //if button 11 pressed, decrease PressCount variable by 1 pressCount--; delay(25); } if(pressCount>4){ //Don't let pressCount go above 4. pressCount=4; } if(pressCount<0){ //Don't let the pressCount variable go into negative #s pressCount=0; } if(pressCount==1){ //When pressCount is 1, turn on LED3 and off everything else digitalWrite(3,HIGH); digitalWrite(4,LOW); digitalWrite(5,LOW); digitalWrite(6,LOW); } else if(pressCount ==2){ //When pressCount is 2, turn on LED3 and off 5 and 6 digitalWrite(4,HIGH); digitalWrite(5,LOW); digitalWrite(6,LOW); } else if(pressCount ==3){ //When pressCount is 3, turn on LED5 and off 6 digitalWrite(5,HIGH); digitalWrite(6,LOW); } else if(pressCount ==4){ //When pressCount is 4, turn everything on digitalWrite(6,HIGH); } else{ digitalWrite(3,LOW); //if pressCount isn't 1,2,3,or 4, turn everything off. digitalWrite(4,LOW); digitalWrite(5,LOW); digitalWrite(6,LOW); } } // (c) 2018 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense