Does this do what you want?
#include <AccelStepper.h>
AccelStepper stepper1(AccelStepper::DRIVER, 4, 5);
void setup()
{
stepper1.setCurrentPosition(0);
stepper1.setMaxSpeed(1000.0);
stepper1.setAcceleration(800.0);
// move 3000 CW steps
stepper1.move(3000);
stepper1.runToPosition();
// then 500 CCW
stepper1.move(-500);
stepper1.runToPosition();
// then stop.
}
void loop()
{
}