@<span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; white-space: nowrap; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; "><h3 class="gD" style="font-size: 13px; font-weight: bold; white-space: nowrap; display: inline; vertical-align: top; color: rgb(121, 6, 25); ">
<span style="position: relative; top: -4px; ">Robby Findler</span></h3> : I see what you mean. But in this example given by Paul Ojanen</span><div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; white-space: nowrap; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; "> </span><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; ">(require 2htdp/image)<br>
(require 2htdp/universe)<br><br>(define BACKGROUND (rectangle 100 100 "outline" "white"))<br>(define TRI (triangle 35 "solid" "blue"))<br><br>(define (render ang)<br> (place-image (rotate ang TRI) 20 20 BACKGROUND))<br>
<br>(define (tock ang)<br> (modulo (+ ang 10) 360))<br><br>(big-bang 0 (on-draw render) (on-tick tock))</span></div><div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; "><br>
</span></div><div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; ">The triangle is not being consistent by keeping its center point on the center of BACKGROUND.</span></div>
<div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; "><br></span></div><div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; ">Hopefully, this makes sense.</span></div>