1. Drag and drop the gates and inputs to the canvas.

2. Connect the gates and inputs to form a circuit. To connect the cicuit draw a line from the source to the destination.
The source can be an input or a gate and the destination can be a gate or an output.
NOTE: You can not draw the connections from destination to source

3. Click on the inputs to change their state.

4. Green color indicates that the output is set to 1.

5. Red color indicates that the output is set to 0.