Triangle switches between pointing up and pointing right with each revolution. With each spin, the doughnut form changes between the left and right corners.
With each turn, the line switches between diagonal and vertical. Square goes anticlockwise around the frame with each rotation.
Triangle alternates 90 degrees with each rotation. Triangle switches from shaded to unshaded with each turn.
Circle in the upper left section for one frame, then omitted for the next two frames, with each rotation. With each turn, the little triangle alternates between the top and lower triangular segments.
Doughnut forms rotate clockwise with each alternate spin. Squares move clockwise with each alternate round.
Square rotates anticlockwise with each alternate rotation. The three-quarter circle rotates 45 degrees with each spin. With each spin, the half circle rotates anticlockwise.
Please keep in mind that the forms are not in any particular order within the frame. It is just the presence and quantity of forms that are essential in this sequence. Every move produces three squares. Every turn contains two diamonds. Every revolution produces a single circle.
With each turn, the line shifts from diagonal to vertical, then to inverse diagonal, and finally to horizontal. With each turn, the dot goes from the top right corner to where it intersects the center line, then to the bottom left corner. With each turn, the triangle goes around the frame's corners anticlockwise.
Square grows in size with each turn (small, medium, and giant). The smallest square informs the decline of one corner circle in the subsequent frame, clockwise. With each turn, the squares alternate between being shaded and unshaded.
With each turn, the square advances from the top left corner to the middle, and then to the right. Every third frame, on each turn, an unshaded square appears. Triangle emerges on each alternate turn.
Every step to the right in each row causes the figure to spin 45 degrees clockwise. The rotation is more visible since a thick line has been added to one side of the triangles.
