Speed makers are 40-60m sprints (usually done on grass) with a 40m-50m jog recovery zone. example:
0-----fast—40m—jog 40m recovery-----0-----fast-----40m
Usually done for 4reps for 3-4 sets with 7 mins rec between sets.
The lay out is in a square. Sides of the square are sprints and the top and bottom are jog recovery. Hope you catch my drift.