GECKO The Gecko moves from left to right and you must catch him when he calls. When you catch him he will appear in your house. On the second sheet you must stand under the Gecko in the tree and jump, and on the third sheet you must catch the Gecko's friend. Graham Bower, aged 13, of Cranleigh, Surrey, who wrote the program for the 48K Spectrum, explains that a gecko is a type of African lizard.