16x2 Lcd screen with UNO, help

Other Hardware LEDs and Multiplexing
5

That how it looks

i inverted the wires and moved them 2 pins, ( becouse the 1 begins att the second? ) atlast it ended upp with all white squares..

i have a potentometer (im not sure how many ohm it is?) and i am not 100% sure if i connect it right.