Using Arduino Uno. Am able to sequence fading two LED's, but get a message that I can't upload sketch to board when trying a third LED. Am I exceeding the IDE limits?
Post the code. Post the EXACT error message.
arteegee: Arduino: 1.6.13 (Windows XP), Board: "Arduino/Genuino Uno"
collect2.exe: error: ld returned 5 exit status
Out of the whole error message you picked the one line that tells absolutely nothing. The part of the error message before that would tell what the actual error was. You also did not post the code like you were asked. Please post the WHOLE code and the WHOLE error message. How you think we can diagnose your problem without that is beyond me.