GlowScript 2.8 VPython
# Defining the Object and Constant Velocity
obj=sphere(pos=vector(-1,0,0),radius=0.1,color=color.red, make_trail=True)

# Setting initial conditions and step size, dt
t=0 
dt=0.05
x0=-1
v0=1.0

# This is main part - the loop
while t<2:
    rate(10)
    x=x0+v0*t
    obj.pos=vector(x,0,0)
    t=t+dt