This program simulates the rotational response of rigid blocks with two options: free rocking rigid block, which captures the natural oscillatory motion of an unrestrained block, and the tendon restrained rocking rigid block, where addition of tendons limit the rocking amplitude of the block. This program provides a versatile platform for engineers and researchers to study the dynamic behaviour of rigid structures, allowing users to explore the influence of parameters including the block geometry, number of tendons, initial prestress force, and ground motion intensity.