Here’s an easy/medium LITS. Getting the puzzle to wrap up was the hardest part.
- Shade some cells to form a tetromino in each region.
- Two tetrominoes of the same shape may not share an edge.
- The shaded cells must also form a connected wall that contains no 2×2 squares of shaded cells.
EDIT: I modified two of the central regions, the puzzle solves more smoothly now.