Will it be visible to others? Will the seal of God in the foreheads of the 144,000 be visible?

Revelation 7:3 Saying, Hurt not the earth, neither the sea, nor the trees, till we have sealed the servants of our God in their foreheads.

  4 And I heard the number of them which were sealed: and there were sealed an hundred and forty and four thousand of all the tribes of the children of Israel.

Will the mark of the beast be visible?

Revelation 13:16 And he causeth all, both small and great, rich and poor, free and bond, to receive a mark in their right hand, or in their foreheads:

  17 And that no man might buy or sell, save he that had the mark, or the name of the beast, or the number of his name.

If so, will people in the tribulation be able to see other people walking past them, some with the seal of God, some with the mark of the beast, and some with neither?

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