I drew this circuit using Fritzing’s PCB view.
The problem with this circuit board is the gaps were too narrow. Even with a little moisture, where will be leaking current somewhere. However, with thorough cleaning (with dish washing paste) and drying (with a hot air gun), it worked without a problem. Hot components will make the LED blink faster.
So I made another one:
Still need to wash and dry to get rid of leaking current.
I have also made a templates out of 2mm acrylic sheet. This will let me make more circuit board easily.