#declare Platform_feature = cylinder {<0,-5,4><0,5.1,4>,0.5}

#declare Platform =
union {
    box {<-4.00,-5.00,-5.00><4.00,5.10,0.00>}
    box {<-5.00,5.10,-5.00><5.00,5.50,20.00>}
    cylinder {<0.00,-5.00,-5.00><0.00,5.10,-5.00>,4.00}
    cylinder {<0.00,5.10,-5.00><0.00,5.50,-5.00>,5.00}
	#declare Count = 0          ;
	#while (Count < 20)
		object {Platform_feature rotate <0,(Count * 18),0> translate <0,0,-5>}
		#declare Count = (Count + 1)   ;
	#end
}