Divide each part in half

Cut and remove 1/4 of the paper

Fold in half

Fold along the diagonal and make only a pinch mark at the intersection

Unfold

Fold the edge to the pinch mark and unfold

Fold between the creases and unfold

Fold the right edge to the crease you just made and unfold

Fold the right edge to the crease you just made and unfold

Divide each segment in half

Divide each segment in half again

Mountain-fold the diagonal of each rectangle

Pleating is a nice way to fold the diagonals

Keep folding the diagonals

Next, I'll show an easier method for beginners

Turn over

Use a thin object and a ruler to mark the diagonal

Valley-fold (it will be a lot easier!)

Now back to the other method

Fold all the diagonals making a zig-zag pattern

Turn over

Fold each valley and mountain creases forming a circle

The rest of the paper will form a cylinder

At this point, keep doing the same but bring it to the top of previous pleats

Reinforce the creases

I like to start the next segment on the side whose edge is on top

Twist the model, making the valley folds (diagonals) and mountain folds

Inside should be a circle like on the bottom If you have a flap like this, rearrange the layers

Collapse the next segments similarly

Finished Spring!