God damn, see my scheme ain't workin
So the shades on my eyes cover pain like a curtain

from Speak – Limbo Lyrics on Rap Genius

Meaning

The lyric should be, “So the shades on my eyes cover* pain like a curtain.

This is a play on words, curtains are different shades of colors and pain could be interpreted as window pane which is would obviously be covered by a curtain.

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