What does this have to do with the 16 (other than the white horse) uses John wrote?
Revelation 1:14
His head and his hairs were white like wool, as white as snow; and his eyes were as a flame of fire;
Revelation 2:17
He that hath an ear, let him hear what the Spirit saith unto the churches; To him that overcometh will I give to eat of the hidden manna, and will give him a white stone, and in the stone a new name written, which no man knoweth saving he that receiveth it.
Revelation 3:4
Thou hast a few names even in Sardis which have not defiled their garments; and they shall walk with me in white: for they are worthy.
Revelation 3:5
He that overcometh, the same shall be clothed in white raiment; and I will not blot out his name out of the book of life, but I will confess his name before my Father, and before his angels.
Revelation 3:18
I counsel thee to buy of me gold tried in the fire, that thou mayest be rich; and white raiment, that thou mayest be clothed, and that the shame of thy nakedness do not appear; and anoint thine eyes with eyesalve, that thou mayest see.
Revelation 4:4
And round about the throne were four and twenty seats: and upon the seats I saw four and twenty elders sitting, clothed in white raiment; and they had on their heads crowns of gold.
Revelation 6:11
And white robes were given unto every one of them; and it was said unto them, that they should rest yet for a little season, until their fellowservants also and their brethren, that should be killed as they were, should be fulfilled.
Revelation 7:9
After this I beheld, and, lo, a great multitude, which no man could number, of all nations, and kindreds, and people, and tongues, stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands;
Revelation 7:13
And one of the elders answered, saying unto me, What are these which are arrayed in white robes? and whence came they?
Revelation 7:14
And I said unto him, Sir, thou knowest. And he said to me, These are they which came out of great tribulation, and have washed their robes, and made them white in the blood of the Lamb.
Revelation 14:14
And I looked, and behold a white cloud, and upon the cloud one sat like unto the Son of man, having on his head a golden crown, and in his hand a sharp sickle.
Revelation 15:6
And the seven angels came out of the temple, having the seven plagues, clothed in pure and white linen, and having their breasts girded with golden girdles.
Revelation 19:8
And to her was granted that she should be arrayed in fine linen, clean and white: for the fine linen is the righteousness of saints.
Revelation 19:11
And I saw heaven opened, and behold a white horse; and he that sat upon him was called Faithful and True, and in righteousness he doth judge and make war.
Revelation 19:14
And the armies which were in heaven followed him upon white horses, clothed in fine linen, white and clean.
Revelation 20:11
And I saw a great white throne, and him that sat on it, from whose face the earth and the heaven fled away; and there was found no place for them.
Please, be my guest! Find ONE USE of what here that represents evil. If you think John would use white this way 16 times, then once for evil, I cannot change your thinking.
If you care to tell us why leprosy turns white, I will read it.