Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions. Testing block positions.