This is what I'm trying to get:

object { MyGrass1 translate <-42.5,0,46.9> } 

object { MyGrass2 translate <-37.5,0,46.9> }
object { MyGrass1 translate <-32.5,0,46.9> }
object { MyGrass2 translate <-27.5,0,46.9> }
object { MyGrass1 translate <-22.5,0,46.9> }
object { MyGrass2 translate <-17.5,0,46.9> }
object { MyGrass1 translate <-12.5,0,46.9> }
object { MyGrass2 translate <12.5,0,46.9> }
object { MyGrass1 translate <17.5,0,46.9> }
object { MyGrass2 translate <22.5,0,46.9> }
object { MyGrass1 translate <27.5,0,46.9> }
object { MyGrass2 translate <32.5,0,46.9> }
object { MyGrass1 translate <37.5,0,46.9> } 

object { MyGrass2 translate <42.5,0,46.9> }

object { MyGrass2 translate <-42.5,0,51.9> } 

object { MyGrass1 translate <-37.5,0,51.9> }
object { MyGrass2 translate <-32.5,0,51.9> }
object { MyGrass1 translate <-27.5,0,51.9> }
object { MyGrass2 translate <-22.5,0,51.9> }
object { MyGrass1 translate <-17.5,0,51.9> }
object { MyGrass2 translate <-12.5,0,51.9> }
object { MyGrass1 translate <12.5,0,51.9> }
object { MyGrass2 translate <17.5,0,51.9> }
object { MyGrass1 translate <22.5,0,51.9> }
object { MyGrass2 translate <27.5,0,51.9> }
object { MyGrass1 translate <32.5,0,51.9> }
object { MyGrass2 translate <37.5,0,51.9> } 

object { MyGrass1 translate <42.5,0,51.9> }

Except I can't figure out how to get the stupid while loops to create a 
checkerboard shape :-/ This is what I've gotten so far (the MyGrass 
Objects are both 5x5 shapes):

#declare X = 0;
#while (X <= 5)

         #declare Z = 0;
         #while(Z <= 6)

                 object { MyGrass1 translate <-12.5-(X*5),0,1.9+(Z*5)> }
                 object { MyGrass1 translate <12.5+(X*10),0,1.9+(Z*5)>  }

                 #declare Z = Z + 2;
         #end

         #declare X = X + 2;
#end

Any help would be GREATLY appreciated :-/

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