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[RedThread]

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Each new term in the Fibonacci sequence is generated by adding the previous two terms.
By starting with 1 and 2, the first 10 terms will be: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ... Find the sum of all the even-valued terms in the sequence which do not exceed four million.

[RedThread]

Visual Basic Code:

Dim Uitkomst As Integer = 0
Dim Total As Integer = 0
Dim X1 As Integer = 1
Dim X2 As Integer = 2
Do
Total = X1 + X2
If Total Mod 2 = 0 Then Uitkomst += Total
X1 = X2
X2 = Total
ListBox1.Items.Add(Total.ToString)
Loop While Total < 4000000
TextBox1.Text = (Uitkomst + 2)