Jon fell in and out of sleep until the huge red sun rose and painted the Old One in scarlet.
The sun rose and colored the Old One in scarlet, but Jon was so tired that he slept through the morning. 
mnli hypothesis: The sun rose and colored the Old One in scarlet, but Jon was so tired that he slept through the morning.  premise: Jon fell in and out of sleep until the huge red sun rose and painted the Old One in scarlet.