The first sin in the Bible was the eating of the forbidden fruit from the tree of knowledge of good and evil by Adam and Eve. The first result of this first sin was a sense of shame and fear when they saw each other's nakedness. The couple immediately responded by the physical act of providing aprons for themselves. According to Genesis 3:7, "Then the eyes of both of them were opened, and they realized they were naked; so they sewed fig leaves together and made coverings for themselves."
They attempted to cover up their shame from each other. The aprons of fig leaves speak of man's fruitless attempt to save himself by a bloodless religion of good works. The fig leaves only addressed the external part of the problem. It covered up the outer man so they would not see each other's nakedness. What the fig leaves couldn't cover was the internal part that was still seen by God. God dealt with the internal problem a different way.
After God had a conversation with Adam, He made coats of skin for Adam and his wife and clothed them (Genesis 3:21). This was the first animal sacrifice; not a bloodless one like the fig leaves. As Adam and Eve wore the animal skins, no doubt they felt the blood on their bodies as a sign of atonement for their sin. Unlike the fig leaves, the coats of skin clothed them entirely; not covering only parts of their bodies. Man's attempt is a futile attempt to save himself. It doesn't come close to what God can do.
If you are trying to use fig leaves to cover up your sins, they won't work. You need the blood of Jesus. Only the blood of Jesus can make you whole again. Dried up fig leaves can't do what the blood of Jesus can!