[br][list=1][*]Create an slider which is name a, with minimum value[br]0.1, maximum value 2, and increment value 0.1.[br][/*][*] Add segment[br]with given length. [br][/*][*]Click the empty plane for selecting a point. Then,[br]this segment is linked with slider.[br][/*][*]Add angle with given size. Click the segment and[br]make the angle 90 degree with counterclockwise direction.[br][/*][*]Click line segment button and connect these two point.[/*][*]Again, add angle with given size. Click the[br]segment and make the angle 90 degree with counterclockwise direction.[br][/*][*]Click line segment botton and connect these two point.[br][/*][*]Again, add angle with given size. Click the[br]segment and make the angle 90 degree with counterclockwise direction.[br][/*][*]Click line segment botton and connect these two point[br]and one square is ready.[br][/*][*]Select the first point and cahnge size and color[br]option with value of 7, color of red. For second point, again change the size[br]with 7, color is green.[br][/*][*]Click the polygon button and create  a polygon with connection these 4 points.[br][/*][*]Click the reflect about line button and firstly[br]select this polygon and then select reflection line. [br][/*][*]Repeat this twelfth step with 3 times for[br]construction first tetris piece. [br][/*][*]Hide all points except first and second points. [br][/*][*]Do all steps from second to fourteenth steps[br]again for construction other 4 tetris pieces. [br][/*][*]Click the line segment button for creating[br]puzzle box and construct the shape of first puzzle. [br][/*][*]Click the slider button which is name puzzle,[br]with a minimum value 1, maximum value 2, and increment value 1. [br][/*][*]Select the whole line segments and right click[br]to select settings option, then choose advanced button. [br][/*][*]Write “puzzle≈1” in the condition to show object[br]part. [br][/*][*]Again, click the line segment button for[br]creating second puzzle box and construct the shape of second puzzle. [br][/*][*]Select the whole line segments and right click[br]to select settings option, then choose advanced button. [br][/*][*]Write “puzzle≈2” in the condition to show object[br]part. [br][/*][*]Click text button and write the explanation of[br]game. [br][/*][/list][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br][br]