Follow these guidelines to create a very nice text-animation!
Step 1 Make a signature and add a text-layer and make sure the layer doesn't have any layer-style;
Step 2 Create a new layer and grab your gradient-tool and set it to Reflected Gradient;
Step 3 Make sure it has the same angle as mine and also make sure it is the same thickness. After that, press CTRL+I to invert the colors!
Step 4 Press CTRL+U and change the color to your needs, after that press CTRL+G to group the layer with the layer UNDER it. Then change the blending-mode to lighten. Then click this button to open Image-Ready!
Step 5 When in Image-Ready, select the gradient-layer and move it all the way out of the text so that you can't see it (left). Do this with the arrow-keys. Now press this button to create a new frame;
Step 6 Press right until you see the gradient move to the other side of the text-area. Then press this button and select these options;
Step 7 Save Optimised as, and it should look like this: