Day 1- WR 1500 pace for 1 METER. That's right, just 1 meter.
Day 2- WR 1500 pace for 2 METERS.
Days 3-1499 run WR 1500 pace and extend by 1 meter each day.
Day 1500- WR 1500 pace for 1500 METERS
1500 days is 4 Years, 1 Month, 1 Week, 2 Days, 13 Hours, 26 Minutes and 40 Seconds