Cut each A4 watercolour sheet into four triangles: measure and mark the sheet into quarters, then cut each quarter into a triangle by cutting diagonally from the top corners to the bottom centre. You will have 12 triangles total, each roughly 10 cm wide at the top.

Wet each triangle with clean water using the size-10 brush. While the paper is still damp, drop indigo watercolour near the top and let it bleed downward. Add a stripe of lamp black near the tip. While everything is still wet, touch one edge with a little gold ink and let it spread naturally. Do not try to control it. The finished wash should look like a night sky. Let each pennant dry completely flat for at least 45 minutes; watercolour paper buckles badly if you rush it.

Once dry, use the fine-tip permanent marker to draw a small bat silhouette or crescent moon shape somewhere on each pennant. Keep it simple: a five-second bat shape reads perfectly well at this scale.

Punch a hole at the top left and top right corner of each pennant.

Thread the gold thread through both holes at the top of each pennant, tying a small knot on the inside edge of each hole so the pennant hangs flat. Position pennants about 5 cm apart along the thread for a dense, tapestry-like effect. Hang between two nails or hooks.