Grid maker
Draw and colour grids of any size.
For checking your work after you’ve tried it yourself.
Step 1: Choose the size
Choose the size
Up to 30 by 30 shows every square; bigger grids show the edges.
Step 2: Colour it
Colour it
Pick a pattern, paint, or lay tiles on it.
Step 3: Read the counts
Read the counts
Exact counts for every colour, then Do it by hand.
What it does.
Makes grids of any size up to a million by a million, colours them with patterns or by hand, places tiles like dominoes on them, and counts each colour exactly, including the part hidden past the dots.
When it helps.
Checking a colouring or tiling argument you made on paper.
What it won’t do.
Tiles work on grids up to 30 by 30, and Fill the rest never searches for a perfect tiling.
Example.
On an 8 by 8 chessboard, every domino covers one square of each colour.
Size
Colours
2
Tap a colour to change it.
Colour = (r + c) mod k. With 2 colours this is a chessboard.
8 × 8Point at or tap a square
Colour counts
- Deep 50%32
- Violet 50%32
64 squares in all.
Under the tiles
- Place tiles to see which colours each piece covers.