It's called a "glass pane". It's not a cube of glass, rather it's the common "Window" people sought for. You make it by using 6 pieces of cubed glass on a crafting table. The cube glass must be placed on the two horizontal bottom rows. It will create 16 glass panes.
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Its 1984 fps
In pure survival, it is impossible to make an End Portal Frame. If you encounter a naturally generated portal, you must place eyes of ender in each of the frames. An eye of ender is crafted by an ender pearl and blaze powder.
4J Studios hasn't put in The End yet but there's still portal frames (creative mode only)
I didn't make Minecraft.
you can't make a pencil in minecraft, but there mite be a mod for it.