Gravity Puzzles

Mr. Pantazis Constantine Houlis is fanatical about sequential movement puzzles. In the past 2 years he's created a series of 'gravity puzzles.' The diagram above shows 5 squares whose edges should match neighboring squares' edges. Note that each piece is extended into the center. Change the orientation and position by rotating the sphere. Difficult & fun. This Mechanical Puzzle Correspondent is reminded of various rolling cube puzzles. Bravo Pantazis!