how do I place my turtles within a square of 5 x 5 patches and 10 x 10 patches?

I am trying to randomly place my turtles within a square of 5 by 5 patches. is this code correct? setxy (50 + random 5) (60 + random 5)

my 2nd question is how do I make a 10 x 10 patch square?