$VAR1 = {
          'name' => 'I1'
        };
$VAR2 = {
          'name' => 'I2'
        };
$VAR3 = {
          'name' => 'O1'
        };
$VAR4 = {
          'name' => 'O2'
        };
Add a direct connection
$VAR1 = {
          'outputs' => [
                         'O2'
                       ],
          'name' => 'I1'
        };
$VAR2 = {
          'name' => 'I2'
        };
$VAR3 = {
          'name' => 'O1'
        };
$VAR4 = {
          'name' => 'O2',
          'inputs' => [
                        'I1'
                      ]
        };
Add a random connection
we have 2 elements to choose from
we picked 1 : O2
we have 2 elements to choose from
we picked 1 : I2
$VAR1 = {
          'outputs' => [
                         'O2'
                       ],
          'name' => 'I1'
        };
$VAR2 = {
          'name' => 'I2',
          'inputs' => [
                        'O2'
                      ]
        };
$VAR3 = {
          'name' => 'O1'
        };
$VAR4 = {
          'outputs' => [
                         'I2'
                       ],
          'name' => 'O2',
          'inputs' => [
                        'I1'
                      ]
        };