Don't you mean barrier blocks? I use /give Idelac minecraft:barrier, and equipping it allows me to see all the barriers you placed. I use the /fill command to change said barriers to TNT, then I blow 'em up.
I build a house of memes, and let's not forget the notorious ones, such as "Splat Tim" and "Everyone is Here".
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[Avatar] My skin, double-wielding swords
[Status] Doing absolutely nothing.
I'm Idelac. I'm a regular on the forum games.
What, were you expecting a more detailed signature?