1) If using the 'mouse' move the pointer over the coloured block and 'click' on it using the left button.
2) If using the keyboard by pressing the keys 'R (RED)','Y (YELLOW)','C (CYAN)' or 'B (BLUE)'.
3) If using the Concept Keyboard use Overlay 6 and press the correct coloured area.
4) If using the hardware response box press the correct coloured button.
Don't take too long to repeat the sequence, or you will lose !