Multistepper.cpp library download

#include <AccelStepper.h>

// Define some steppers and the pins the will use
AccelStepper stepper1; // Defaults to 4 pins on 2, 3, 4, 5
AccelStepper stepper2(4, 6, 7, 8, 9);
AccelStepper stepper3(2, 10, 11);

The .cpp may not required. Build a folder titled \Arduino\libraries\AccelStepper and copy the single .h file there. Restart the IDE.

Ray