GlowScript 2.7 VPython

g1=graph(width=400, height=250)
xDots=gdots(color=color.green, graph=g1)
vDots=gdots(color=color.red,graph=g1)

obj=sphere(pos=vector(-1,0,0),radius=0.5,color=color.red)
spring = helix(pos=vector(-5,0,0), axis=vector(4,0,0), radius=0.5)
wall=box(pos=vector(-5.5,0,0),length=0.5, height=2, width=0.25)

t=0; dt=0.01
x=-1 
v=0
k=1; m=1

while t<25:
    rate(200)
    obj.pos=vector(x,0,0)
    spring.axis=vector(x+5,0,0)
    xDots.plot(t,x)
    vDots.plot(t,v)
    
    F=-k*x
    a=F/m
    v=v+a*dt
    x=x+v*dt
    t=t+dt