The Scrapyard Challenge is a side mission in GTA Liberty City Stories. The location of this mission is the Harwood Autocrusher and Junkyard. To start just hop on the Sanchez next to the gray building. Once you start the goal is to get more than 22 point collecting coronas dotted around the track in under two minutes. Green coronas are the easiest to collect as they are only worth one point. Yellow coronas are a little harder to collect and are worth two points. And red coronas are the hardest to collect and are worth 3 points.