Print Speed Test Block

Gcode is set to print at 10mm/sec, 20mm/sec, 30mm/sec, 40mmsec, 50mm/sec, 60mm/sec. This code is for a CR-10, assembled from multiple slices out of Cura.

20191018 - I uploaded a new version of the G-code. The first didn't change speeds until the last speed. This one should work as expected