I've always wondered why this happens...

[Wallace]

When there is red writing on a blue background, (or vice versa), why does it look like it is flashing if you catch sight of it out of the corner of your eye?

As long as it needs to be RTMTMML

And if it isn't, just tie two pieces together

But if you mean the string in bluestring soup, about 12 inches.

thanks soupy, that's all I needed to know.