Which test do I use?

Hi! I am doing my dissertation on attentional biases in children. I have two conditions (threat and non-threat) and I want to look the % of looking time from an eye tracker per 3 scenes. This is not a final analysis but do I have to run a 2*3 anova? Each child will view scene 1 and 2 twice and 3rd one once.

Please help <3