Step 1:
Tape or glue two square papers together. The backside is white.

Step 6:
Fold over these two lines, the short line on the left is a mountain-fold.

Step 5:
Fold over this line.

Step 2:
Prefold in half

Step 4:
Fold over this line

Step 3:
Prefold the edges to the centerline.

Step 10:
Fold over these two lines

Step 8:
The mountain-fold is already prefolded.

Step 9:
Repeat step 8 two more times.

Step 7:
Turn the model.

Step 16:
Tape both ends together.

Step 15:
This is tin foil taped to a rectangular white paper. Fold in half a few times.

Step 12:
Tape or glue both edges together, see arrows.

Step 11:
Repeat step 8 to 10 on the left.

Step 14:
The tail is done....

Step 13:
Bend / fold the tail sidewards on two places, see arrows.