I believe this is a young changeable lizard.
Sorry for the bad pic. Its a screen grab. I knew I wouldn't be able to get close enough with my iPhone to get a proper pic so I used video and pushed in as close as i could before it ran off. The original video is posed here and gives a better impression of the lizard.
Male C. versicolor in breeding colors. Long Hoa, Vietnam
A female observed on a cement litter bin near the beach. She was kind enough to pose before scuttling off into the under brush.
Calotes versicolor (Daudin, 1802)
A very commonly found lizard in Hong Kong and on cooler days is very often found sunning itself on concrete or sunny shrubs.
Up a tree within the hotel garden grounds.
Resting on plants over a small pond in the town centre.
Found asleep inside a water catchment storm drain (presumably stuck).
Changeable Lizard (Calotes versicolor) at Bundala Reserve, Sri Lanka. Photographed on 25 July 2007
Common on trees, walls, and other vertical surfaces without much cover. Males not seen in breeding or display colours.
It was climbing and then from the top it gave beautiful pose for this picture.