Programming is an inherent part of informatics both at university and at primary, secondary and high schools in Slovakia. In our paper we describe programming oriented courses attended by our university students - the pre-service teachers. Further we describe programming knowledge and skills of secondary school pupils. We present a certain type of a computer game that we use already for several years as a motivation when teaching programming both at university and with younger children. As an example we focus on one assignment which was first presented to our university students as a final test after a programming course in Imagine. The same assignment was rewritten for 10-15 years old children and used in a programming competition Imagine Logo Cup 2012. We also present two different approaches to the solution of this assignment - one using object-oriented programming and one without objects.