diff --git a/src/environments/examples/CartPoleEnv.jl b/src/environments/examples/CartPoleEnv.jl
index 4b4ded9..87f1e69 100644
--- a/src/environments/examples/CartPoleEnv.jl
+++ b/src/environments/examples/CartPoleEnv.jl
@@ -131,7 +131,8 @@ function plotendofepisode(x, y, d)
     end
     return nothing
 end
-function Base.show(io::IO, m::MIME"image/png", env::CartPoleEnv)
+
+function GR.plot(env::CartPoleEnv)
     s, a, d = env.state, env.action, env.done
     x, xdot, theta, thetadot = s
     l = 2 * env.params.halflength
@@ -146,6 +147,6 @@ function Base.show(io::IO, m::MIME"image/png", env::CartPoleEnv)
     setlinecolorind(2)
     drawarrow(x + (a == 1) - 0.5, -.025, x + 1.4 * (a == 1) - 0.7, -.025)
     plotendofepisode(xthreshold - 0.2, l, d)
-    p = updatews()
-    show(io, m, p)
+    updatews()
+    plot()
 end
diff --git a/src/environments/examples/MountainCarEnv.jl b/src/environments/examples/MountainCarEnv.jl
index 872d5a0..e100243 100644
--- a/src/environments/examples/MountainCarEnv.jl
+++ b/src/environments/examples/MountainCarEnv.jl
@@ -141,7 +141,7 @@ height(xs) = sin(3 * xs) * 0.45 + 0.55
 rotate(xs, ys, θ) = xs * cos(θ) - ys * sin(θ), ys * cos(θ) + xs * sin(θ)
 translate(xs, ys, t) = xs .+ t[1], ys .+ t[2]
 
-function Base.display(io::IO, m::MIME"image/png", env::MountainCarEnv)
+function GR.plot(env::MountainCarEnv)
     s = env.state
     d = env.done
     clearws()
@@ -167,6 +167,6 @@ function Base.display(io::IO, m::MIME"image/png", env::MountainCarEnv)
     xs, ys = translate(xs, ys, [x, height(x)])
     fillarea(xs, ys)
     plotendofepisode(env.params.max_pos + 0.1, 0, d)
-    p = updatews()
-    show(io, m, p)
+    updatews()
+    plot()
 end