here is pictures how to build this
Step 1: What You Need
First you have to find a super capacitor,this kind of capacitor you may find in old vcr,this cap is use for memory for clock in the vcr.
Next part is led diode (any color) and resistor from 220 to 470ohm.
Conect the led diode to super cap,in the corect way-positive to positive,negative to negative
Below i s shown how to conect the parts.