New 10-line graph demo

Demo_Graph_Element_Sine_Wave.py

@@ -0,0 +1,14 @@
+import math
+import PySimpleGUI as sg
+
+layout = [[sg.Graph(canvas_size=(400, 400), graph_bottom_left=(-100,-100), graph_top_right=(100,100), background_color='white', key='graph')],]
+
+form = sg.FlexForm('Graph of Sine Function').Layout(layout)
+form.Finalize()
+graph = form.FindElement('graph')
+
+for x in range(-100,100):
+    y = math.sin(x/20)*50
+    graph.DrawPoint((x,y))
+
+button, values = form.Read()