How do you get a tractor in harvest moon innocent life for psp?

if you want to get the tractor thingy you called, collect 4 blue jewels and place them on the altar. go to sleep, and next morning (6.00 a.m.) VOILA! there you go! a buggy (NOT A TRACTOR!), a present from doctor hope will be waiting for you near a tree (i can't remember what tree it is)!