Put a blue sphere on the right side of the light blue ones.
Put a red sphere between the blue and the green at the right end of the string.
Put a blue sphere between the red and light blue ones.
Collapse the string with a light blue sphere.
Put a green sphere to the left end of the middle string.
Put a red sphere between the green and black ones.
Collapse the left string with a white sphere.
Collapse the last string with a black sphere.
Eliminate the green spheres with the wild ball.