Painted Ladybird (Ladybug) rocks ... the 'staple' rock for seasoned Rockers (rock painters) and beginners alike. They're as simple or as complex as you wish. But a basic ladybird is always a favourite.
For this rock, you just need black, for the head section, white, for the eyes and a colour of your choice for the body (in this tutorial, this additional colour is red). A pencil might be of use and, not forgetting, paintbrushes.