Lay the flag flat and smooth it out
Fold the lower striped half lengthwise over the blue field
Fold it lengthwise again so the blue field is on the outside
Make a triangular fold from the striped end over the folded edge
Continue folding the triangle inward along the length of the flag
Keep folding triangles until only the blue field remains visible
Tuck the remaining edge into the folds to secure the flag
Ensure the final shape is a neat triangle with only the blue field showing