Prey cells that stuck to bait cells turned blue through a complex biochemical process which was also engineered into them.

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When the footage was first shot, each frame was run consecutively through red, green or blue gels, and the process needed to be reversed during projection to reveal the color.

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We completed the acceptance process on the Blue Waters supercomputer at the University of Illinois, but were not able to complete the upgrade to the XK7 system at Oak Ridge National Laboratory.

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He also noted in a patent filing that the process allowed the blue-screen procedure to cope with glassware, cigarette smoke, blowing hair and motion blur which had all caused problems for earlier efforts.

BBC: Blue and green-screen effects pioneer Petro Vlahos dies

The process will involve building a Blue Gene supercomputer with 8, 000 processors that can roar along at 23 trillion operations per second.

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So, with the economy improving and the Fed committed to keeping things moving forward, it looks like traders are in the process of once again discounting blue skies ahead.

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Mr Vlahos's breakthrough was to create a complicated laboratory process which involved separating the blue, green and red parts of each frame before combining them back together in a certain order.

BBC: Blue and green-screen effects pioneer Petro Vlahos dies

While ice reflects around 80 percent of the sun's heat, having a cooling effect, blue sea water can absorb up to 95 percent of solar radiation, warming up the sea and accelerating the melting process further.

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