Perfore el tube de pegamento para que entre el led en cada extremo.
Then insert the glue stick with the led into the soda lid.
Join all the GND contacts in one wire; a join the positive contact of the led's of each segment.
I don't use a 74hc595 to control the led's, because a don't have four of them right now, instead i use a MC23017 to control the 7 segments.
The circuit is really basic:
The schematic is this
On the MCP23017 the pin's number 1 to 8 and 21 to 28 will be connected to the leds.