This is a semi-art piece that I made using a simple electronic circuit to flash a couple of lamps. You can adjust the timing by turning a couple of control knobs. Its made using tag board and freeform electronic layout.
The astable multivibrator circuit is a well known circuit that uses two transistors cross-connected in two state configuration. I liked this circuit when I was a kid, as some friend of the family wired one up and gave it to me as a present. I spent a lot of time playing around with them when I was first learning electronics.