strange avrdude error

I downloaded a code (that runs a persistence-of-vision-based clock using LEDs on a rotating arm), but am having trouble getting off the ground because of the following error I get when uploading:

Binary sketch size: 8,118 bytes (of a 32,256 byte maximum)
avrdude: stk500_getsync(): not in sync: resp=0x00

This comes only when uploading, not when compiling. Am using an Arduino UNO.

Any clues on what I need to do/check?

Hope this is the right forum for this, I did search for avrdude to see if others have had this problem but didn't find any.

Make sure the right serial port is selected in the IDE.