If you type:
BOX 40 40 CIRCLE 40 JT 40 0, you will see the
following picture:
Notice that the triangle (called the turtle) is ready to draw the next picture besides the original one. So if you type now in the command line:
REPEAT 3 IT, you will three copies side by side:
and the text in the editor will become:
REPEAT 3 [
BOX 40
40 CIRCLE 40 JT 40 0
]
Part I: Load Repeat Practice
The first picture Shows 8 lines next to each other.:
To create the picture you can draw one line and place the triangle
at the start of the second line and type REPEAT 8 IT. You could also
type directly in the editor something like
REPEAT 8 [FD 30 GOMV15
-30] or
REPEAT 8 [FD 30 JT 15 0]
The second and the third pictures can be done using the same idea
as the first one
:
However, the forth picture is based on a different idea: 
Here the turtle moves a very small step forward (FD 1) and turns
a very small amount to the right (RT 1) and since it is half a
circle, it must repeat IT 180 times.
The fifth exercise does introduce a related idea. Since there are
360 degrees in each turn and since 72 * 5 = 360 we get a pentagon
using the command REPEAT 5 [FD 50 RT 72] 
The star below is actually also five
sided like the pentagon. In both figures all the sides and turns are
equal to each other. The only difference is that the total number of
degrees that the turtle turns in the case of the star is 2*360=720
and thus each turn is 720/5=144.
REPEAT 5 [FD 50 RT 144] 
Part II: Load Exercises