I'm sure I've ......

....done this one before but....last time it was yellow!  See 25 August 15 (I don't know how to do a link & cant work it out).  I've only one little cactus like this and it's blooming it's heart out this year.  As near to a circle as I can get today.  

Started my 'holiday sketching' and now having a glass of something fizzy!