I've been interested in crocheting a baby blanket in this style for a while now and recently found out it's called "Entrelac" crochet, it is a French word meaning lattice. I found a tutorial on Utube and taught myself from watching the Utube videos... I started with the two white squares in the middle and using alternate colours you just keep going round and round.... I have posted three photos of three different stages to see it growing.
This is how it looks so far , I have only used 1/2 ball of yarn of each colour so far. It's not going to be big, for this first practice one I'm just going to use 1 ball of each colour and it should be big enough to use as a pram cover. I'm really enjoying it and having fun...