A program to demonstrate the optimization process of particle swarm optimization. A two-dimensional objective function is visualized by level of grey: the lighter the color, the higher the function value. The particles are shown as red circles, their trajectory as red lines.-A program to demonstrate the optimization process of particle swarm optimization. A two - dimensional objective function is visualized by level of gray : the lighter the color, the higher the value function. The particles ar e shown as red circles. their trajectory as red lines.