Print this page on one sheet, one side only,
in landscape. Then:
Crease each FOLD line and fold the sheet up like a concertina.
Crease the two FOLD & TEAR edges and tear the spare paper off against the crease.
The top and left edges are the sheet's own — leave them alone.
No scissors, no double-sided printing. 4 panels, 4x1 accordion.
If the print preview shows a tall page, set the
orientation to landscape by hand — some browsers ignore the page setup
this sheet asks for, and the fold marks only line up on a wide sheet.