games that can be adapted for use with the present invention alternatively rather than employ overlay mask 30 the pattern to be provided could be displayed directly on the screen 18 the pattern could be broadcast by tv stations or alternatively could be sent to a non used channel over closed circuit or catv lines this embodiment is described in greater detail hereinafter with respect to fig7 and 8 the control unit 14 will now be described in detail by referring to the block diagram shown in fig3 the timing for the television gaming system is established within the control unit by a horizontal sync generator 31 and a vertical sync generator 32 the horizontal sync generator 31 employed in this embodiment is a multivibrator whose output is a series of pulses rather than a square wave the repetition rate of these pulses is the standard horizontal scanning frequency used in commercial television receivers the positive sync pulse output 81 of the horizontal sync generator 31 is simultaneously applied to a first 34 dot 34 generator 34 a second 34 dot 34 generator 35 and a chroma generator 33 in color tv applications the negative sync pulse output 82 of the horizontal sync generator 31 is applied directly to a summing amplifier modulator 37 the 34 dot 34 generators 34 and 35 when triggered by horizontal sync generator 31 generate a pulse which is the horizontal video information portion of the television composite signal that forms the 34 dots 34 20 on the television receiver screen 18 the manual control knobs 16 17 and 16 1 17 1 on the control unit are.