diff --git a/lib/checker.jpg b/lib/checker.jpg
new file mode 100644
index 0000000..bc4e51e
Binary files /dev/null and b/lib/checker.jpg differ
diff --git a/lib/checkerball.mtl b/lib/checkerball.mtl
new file mode 100644
index 0000000..8b07bb5
--- /dev/null
+++ b/lib/checkerball.mtl
@@ -0,0 +1,13 @@
+# Blender3D MTL File: checkerball.blend
+# Material Count: 1
+newmtl Material.001_checker.jpg
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+illum 2
+map_Kd checker.jpg
+
+
diff --git a/lib/checkerball.obj b/lib/checkerball.obj
new file mode 100644
index 0000000..6817b15
--- /dev/null
+++ b/lib/checkerball.obj
@@ -0,0 +1,1694 @@
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+# www.blender3d.org
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diff --git a/lib/checkerball.phy b/lib/checkerball.phy
new file mode 100644
index 0000000..e55a46b
--- /dev/null
+++ b/lib/checkerball.phy
@@ -0,0 +1 @@
+sphere "Sphere" 1.000000  0.000000 0.000000 0.000000
diff --git a/libsrc/checker.jpg b/libsrc/checker.jpg
new file mode 100644
index 0000000..bc4e51e
Binary files /dev/null and b/libsrc/checker.jpg differ
diff --git a/libsrc/checkerball.blend b/libsrc/checkerball.blend
new file mode 100644
index 0000000..841866c
Binary files /dev/null and b/libsrc/checkerball.blend differ
diff --git a/tests/ballstairs.lua b/tests/ballstairs.lua
index 2014ed5..87d56a4 100755
--- a/tests/ballstairs.lua
+++ b/tests/ballstairs.lua
@@ -4,9 +4,8 @@ function update()
     ag.setCamera(7, -6, 15, ballx, bally, ballz, 0, 0, 1)
 end
 
---ag.setCamera(8, -8, 15, -8, 8, 4, 0, 0, 1)
 arena = ag.loadStaticModel("boxarena")
-ball = ag.loadModel("ball")
+ball = ag.loadModel("checkerball")
 ball:setPosition(-7, 7.4, 12)
 ball2 = ball:clone()
 ball2:setPosition(-7, 7.4, 14)