Parallel Link Mechanism >Button 1 will rotate only the lower rod. >Button 2 will rotate only the upper rod. >Button 3 will rotate the upper and lower rods in the same direction >Button 4 will rotate the upper and lower rods in the different direction >Button 5 will rotate the upper rod faster and in the opposite direction compared to the lower rod. >Button 6 will rotate the upper rod slower and in the opposite direction compared to the lower rod.