diff --git "a/03.\347\255\211\351\200\237\345\272\246\347\233\264\347\267\232\351\201\213\345\213\225/3_1DMotion.py" "b/03.\347\255\211\351\200\237\345\272\246\347\233\264\347\267\232\351\201\213\345\213\225/3_1DMotion.py"
index 00d35cc..7c8438e 100644
--- "a/03.\347\255\211\351\200\237\345\272\246\347\233\264\347\267\232\351\201\213\345\213\225/3_1DMotion.py"
+++ "b/03.\347\255\211\351\200\237\345\272\246\347\233\264\347\267\232\351\201\213\345\213\225/3_1DMotion.py"
@@ -20,7 +20,7 @@
 """
 scene = canvas(title="1D Motion", width=800, height=600, x=0, y=0, center=vec(0, 0.1, 0), background=vec(0, 0.6, 0.6))
 floor = box(pos=vec(0, 0, 0), size=vec(L, 0.1*size, 0.5*L), color=color.blue)
-cube = box(pos=vec(-0.5*L + 0.5*size, 0.55*size, 0), size=vec(size, size, size), color=color.red, v=vec(v, 0, 0))
+cube = box(pos=vec(-0.5*L + 0.5*size, 0.55*size, 0), size=vec(size, size, size), color=color.blue, v=vec(v, 0, 0))
 #cube = box(pos=vec(-0.5*L + 0.5*size, 0.55*size, 0), length=size, height=size, width=size, color=color.red, v=vec(v, 0, 0))
 gd = graph(title="x-t plot", width=600, height=450, x=0, y=600, xtitle="t(s)", ytitle="x(m)")
 gd2 = graph(title="v-t plot", width=600, height=450, x=0, y=1050, xtitle="t(s)", ytitle="v(m/s)")