According to Moses, this verse talks about a pretty curtain that hung at the entrance of a special place. It was made with beautiful colors and fabric, showing how important and special this area was.
Exodus 38:18: And the hanging for the gate of the court [was] needlework, [of] blue, and purple, and scarlet, and fine twined linen: and twenty cubits [was] the length, and the height in the breadth [was] five cubits, answerable to the hangings of the court.
Describes the old covenant becoming obsolete, which contrasts with the specificity of Exodus 38:18 detailing tabernacle construction.
Hebrews 8:13: In that he saith, A new [covenant], he hath made the first old. Now that which decayeth and waxeth old [is] ready to vanish away.