a=

b=

s_1=

s_2=

Volte souřadnice středu S 
a velikost hlavní a vedlejší poloosy a,b
a>b

a = 3 (slider from 0 to 5, step 1)
b = 2 (slider from 0 to a, step 1)
pole2 = Textfield(a)
pole3 = Textfield(b)
s_1 = -7.43643986524009
s_2 = 2.4740969951174785
S: (s_1, s_2)
pole1 = Textfield(s_1)
pole4 = Textfield(s_2)
c: 1 = (x - s_1)^(2) / a^(2) + (y - s_2)^(2) / b^(2)
f(x) = (x - s_1)^(2)
g(y) = (y - s_2)^(2)
d: a^(2)
e: b^(2)
text1: "\frac{" + (LaTeX[f]) + "}{" + (LaTeX[d]) + "}+\frac{" + (LaTeX[g]) + "}{" + (LaTeX[e]) + "}=1"