So first of all we need some more textures. I have created some variants of the gold block . To keep the name of the textures simple I added a number to each texture name (mygoldtexture.png,mygoldtexture1.png,mygoldtexture2.png,mygoldtexture3.png)
mygoldtexture.png
mygoldtexture1.png
mygoldtexture2.png
mygoldtexture3.png