Now select the Layer Mask and use the Paint Bucket Tool (G) to paint it black. You see the Layer is hidden now.
Change to the Brush Tool (B) and paint with white color the part you want to see! (Be sure that the Layer mask is
still selected!)
Once again i made everything wrong, because i didnt select the Layer Mask
We have succesfully used the Layer mask! But now we have to add the text effect. this will be easy as well. Right click the
Layer Mask -> Set Selection To Layer Mask. We selected the white parts of our Mask. we duplicate the Text Layer and select the Copy and press the Add
Layer Mask Button. It still looks the same, but now we change the color of our text Layer. To do this
Select the layer and press (T) for the Type Tool, select the color and we finished our work!