Here is a lovely poster showing John the Baptist baptising Jesus in the River Jordan. John is clothed in his traditional camel's hair. As Jesus comes out of the water we see the heavens torn apart and the Spirit descending like a dove on him. God the Father proclaims 'You are my Son, the Beloved; with you I am well pleased.'
So in a sense we have a lovely scene of the Holy Trinity - and it reminds us that when we were baptised, we were baptised in the Name of the Father, and of the Son, and of the Holy Spirit.