diff --git a/src/main.ts b/src/main.ts
index 36c603c..810cb4b 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -99,14 +99,14 @@ const scene = sync({
   const [width, height] = size
 
   // calculate available drawing area
-  const xCells = Math.floor((width - 2 * padding * cellSize) / cellSize)
+  const xCells = Math.max(0, Math.floor((width - 2 * padding * cellSize) / cellSize))
   const xPadding = (width - (xCells * cellSize)) / 2
 
-  const yCells = Math.floor((height - 2 * padding * cellSize) / cellSize)
+  const yCells = Math.max(0, Math.floor((height - 2 * padding * cellSize) / cellSize))
   const yPadding = (height - (yCells * cellSize)) / 2
 
-  const xLines = [...map(l => scale(l, cellSize), generateLines(yCells, xCells, cycle(ySeeds), xLineGen))]
-  const yLines = [...map(l => scale(l, cellSize), generateLines(xCells, yCells, cycle(xSeeds), yLineGen))]
+  const xLines = xCells && yCells ? [...map(l => scale(l, cellSize), generateLines(yCells, xCells, cycle(ySeeds), xLineGen))] : []
+  const yLines = xCells && yCells ? [...map(l => scale(l, cellSize), generateLines(xCells, yCells, cycle(xSeeds), yLineGen))] : []
 
   return translate(
     group(