So I have just started with arduino and I found that this LED tutorial I was following wasn't working. I tried moving the power wire to other ports and when I moved it into ground it suddenly worked. I do not even need to plug the ground wire into anything for it to work. I have no idea why this is happening. I am on the arduino uno and here is the breadboard layout sheet and the code: http://ardx.org/src/circ/CIRC02-sheet-OOML.pdf
I have checked a thousand times that I have everything wired correctly and plugged into the right ports. What could be the issue?