Hello, I am new here,  I was just wondering about two questions How would I use VHDL code as well as ucf to change the LED light intensity?? I know the up voltage is 3.3V and I cant seem to give it any other voltage aside from 3.3 using LVCMOS33 on the nexys 4 DDR. However I noticed that the built in default bit file in the board was able to make the light seem deemer, so I am also wondering,where do I download that default bit file so I can look at the code??? or how would I extract i