We can construct immutable Quilts. A quilt is a grid of squares.
There are only two squares: b and c.
There are two operations
turn and sew.
| Command | Meaning |
|---|---|
| Quilt.b |
 |
| Quilt.c |
 |
| Quilt.b.turn() |
 |
| Quilt.b.sew(Quilt.c) |
|
We can construct immutable Quilts. A quilt is a grid of squares.
There are only two squares: b and c.
There are two operations
turn and sew.
| Command | Meaning |
|---|---|
| Quilt.b |
|
| Quilt.c |
|
| Quilt.b.turn() |
|
| Quilt.b.sew(Quilt.c) |
|
The default program renders a b quilt.
Use the sew method to produce two b squares:
Create a row of four b squares.
Put two bs together, then turn.
Use the previous answer and sew it to the same again.
Turn the c twice to produce thick and thin stripes.
