Piecing these notes together, what colours do you see? The key and time signatures can both help you keep count.
You can always print it larger if you’re finding it too fiddly! The key and time signatures might help you figure out the length of each colour. Then just count up!
Once you piece together the jigsaws you’ll need to decide on the colours. The key/time signature provides you with the colour’s length. The notes give you which letters to look at (don’t forget to look at the key signature!) and make sure to think about the length of the notes.