diff --git a/lyx1.drawio.svg b/lyx1.drawio.svg
new file mode 100644
index 0000000..99afe55
--- /dev/null
+++ b/lyx1.drawio.svg
@@ -0,0 +1,89 @@
+<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="181px" height="511px" viewBox="-0.5 -0.5 181 511" content="&lt;mxfile&gt;&lt;diagram id=&quot;wo5jVe5_veYJWB7CKM0g&quot; name=&quot;Page-1&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;">
+    <defs/>
+    <g>
+        <path d="M 90 100 L 90 153.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 90 158.88 L 86.5 151.88 L 90 153.63 L 93.5 151.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <ellipse cx="90" cy="50" rx="60" ry="50" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 50px; margin-left: 31px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                <font style="font-size: 17px;">
+                                    开始
+                                </font>
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="90" y="54" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    开始
+                </text>
+            </switch>
+        </g>
+        <path d="M 90 220 L 90 273.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 90 278.88 L 86.5 271.88 L 90 273.63 L 93.5 271.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="0" y="160" width="180" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 178px; height: 1px; padding-top: 190px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 17px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                输入
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="90" y="195" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="17px" text-anchor="middle">
+                    输入
+                </text>
+            </switch>
+        </g>
+        <path d="M 90 390 L 90 423.63" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 90 428.88 L 86.5 421.88 L 90 423.63 L 93.5 421.88 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="35" y="280" width="110" height="110" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 108px; height: 1px; padding-top: 335px; margin-left: 36px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 17px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                输出
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="90" y="340" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="17px" text-anchor="middle">
+                    输出
+                </text>
+            </switch>
+        </g>
+        <ellipse cx="90" cy="470" rx="60" ry="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 470px; margin-left: 31px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 17px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                结束
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="90" y="475" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="17px" text-anchor="middle">
+                    结束
+                </text>
+            </switch>
+        </g>
+    </g>
+    <switch>
+        <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
+        <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
+            <text text-anchor="middle" font-size="10px" x="50%" y="100%">
+                Text is not SVG - cannot display
+            </text>
+        </a>
+    </switch>
+</svg>
\ No newline at end of file