Abstract: A continuous tracing light controller for controlling the flashing of a plurality of bulbs comprising:a bridge rectifier for the conversion of AC to DC;an inverter phase circuit for the reverting of the above obtained DC; anda programmable central control integrated circuit having a plurality of outputs for the individual controlling of bulbs in series, a three step switch and 3 variable resistors being connected to said integrated circuit. The controller controls the lighting pattern in a fully lighted, forward tracing or backward reversing pattern. The way of controlling of the controller is by means of Pulse Width Modulation in which a pulse wave synchronized with a current is input and by use of a counting pulse to control the time sequence of the input pulse. By controlling the response time delay of the individual wave such that the individual light bulb responds at different time so as to produce visual effects for which the bulbs are lighted in a continuous tracing manner.