This invention concerns the use of compounds of formula wherein -a1=a2-a3=a4- is a radical of formula \u2014CH\u2550CH\u2014CH\u2550CH\u2014, \u2014N\u2550CH\u2014CH\u2550CH\u2014, \u2014CH\u2550N\u2014CH\u2550CH\u2014, \u2014CH\u2550CH\u2014N\u2550CH\u2014, \u2014CH\u2550CH\u2014CH\u2550N\u2014wherein each hydrogen atom may optionally be substituted; Q is a radical of formulas, ,, ,, ,,. A parameter \u201csum fill\u201d is calculated for each pixel. For example, if the ball flies in a direction toward an outfield, the outfield neighboring a partial game image displayed in the half of the display surface in the outfield direction within the reference game image is displayed as an adjacent game image instead of the partial game image.