Make LED light up from serial monitor - Programming Questions - Arduino Forum

I want to controll red diode with a comand, blue diode with a comandand same with green. 3 different if statements. I want it as basic as possible so I can understand the code const int RED = 9; const int GREEN = 8; const int BLUE = 7; void setup() { pinMode(RED, OUTPUT); pinMode(GREEN, OUTPUT); pinMode(BLUE, OUTPUT); } void loop() { digitalWrite(RED, HIGH); digitalWrite(GREEN, HIGH); digitalWrite(BLUE, HIGH); }

Lost, I build this with wokwi. It's a TopTechBoy(Paul McWhoter) lesson. The red led works fine, but not the yellow? Any ideas on where to begin to debug? I am scared to ask any project question, but I have to keep trying to learn. : r/arduino

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