//Cube
cube([10,10,10]);

//Sphere
sphere(10);

//Translate
#translate([10,10,10])
cube([10,10,10]);

//Rotate
rotate(a=90, v=[1,0,0])
cylinder(r1=5, r2=5, h=20);

//Loop
for(i=[10:10:100]){
    translate([20,i,0])
    cylinder(r1=5,r2=1,h=10);
}