val=average[10] Return val coloured(255,0,0) style(point,5) above works val=average[10] DotSize=5 Return val coloured(255,0,0) style(point,DotSize) syntax error: line 3, col 42 one of the following suits better than “DotSize”: a text width (1-5) Should nothing be wrong with the code (Nicolas: a variable can only be a number – I keep in mind what you say 😉 , we need a number and I defined one) Comments please. Thank you.