The half square triangle unit is probably the most commonly used patch in a quilt block -- well it is second only to the square. It is made simply with two triangles, filling up half the square each -- hence the name. Take a quick look through this website, or in any quilting magazine, and you will start to notice that this half square triangle, regardless of its size, is present in more quilts than not.
Free Quilt Block Pattern
The Grape Basket quilt block is one of dozens of "basket" blocks. Many a quilt has been made of only basket blocks and no two blocks were the same. Generally, the basket type of quilt block is made of half square triangles, rectangles and sometimes squares. In the example shown, I have made the basket with a variety of "flowers".
The sample quilts show a large quilt, set on point with sashing between the quilt blocks, and a single block set medallion style, and "framed" like a picture. You are only limited to your imagination.