Bleaching old tshirts to liven them up

I had two older tshirts, plain, and some bleach available, so the inevitable happened and I did a bit of freeform bleaching on them.  Just regular strength household bleach.  There may later be stitching into these designs, I'll see how I like them in action.

As you probably know, when you bleach designs like this, you stop the process as soon as it has done what you want, by rinsing.  Otherwise the bleach is liable not only to spread further and further, but to eat through the fabric here and there, which might not be what you meant.

This is just one of those things you idly do when you're considering a load of laundry and thinking you should be socially conscious and not put the machine on till off-peak hours, considering we're in the midst of a heatwave.  But meanwhile..