I saw this at Raffles City Shopping Centre. It's part of the Singapore Art Show. Two ladies were putting up a Rangoli - sandpainting. You can see this in many Indian (Hindu) houses especially during Deepavali.
I did not know that the Singapore Art Show is on until I saw this roadshow at the shopping centre. It's quite interesting, the program that they have lined up. Take a look at www.singaporeartshow.sg or visit the National Arts Council website at www.nac.gov.sg