It is time to make the bed.  First I take the pillows off of the bed and place them  on the floor of my bed room.  I pull the blanket and flat sheet off of the bed and set it on top of the pillows.  The only thing on the bed is now the fitted sheet.  I go to one corner of the bed and untuck the corner of the fitted sheet so I can shake  the sheet 3 times before putting it back on the corner of the mattress. I put the flat sheet on the bed first, making sure its flat with no wrinkles.  I put the blanket on top of the sheet, making sure it is on the bed straight with no wrinkles.   I tuck the sheet and blanket under the mattress at the bottom of the bed, The pillows are placed at the top of the bed.
Do the sheets need to be washed?