php - How to create form in Drupal 7 -

i want create form in drupal 7 similar in following link : https://bmicalculator.cc/?gclid=cirvnaxv1mqcfqwnjgodvwgalq

form should start text "bmi calculator", 2 columns similar in link , note text similar "bmi can inaccurate people..."

i know little bit drupal form api can create form how display text @ top, how create form in 2 columns , again text after form.

i new drupal , hence don't have deep understanding of how drupal works.

to display text @ top, use #markup item in form render array. can embed html need in markup.

for 2 columns, use #container type in form render array. allows wrap <div> around child elements. can float div needed.

so example be

$form = array( /*  * ... form header info here  */  'header' => array(    '#markup'=>'<h1> bmi calc </h1>',  ),  'col1'=>array(    '#type'=>'container',    'subitema'=>array(       //some stuff    ),    'subitemb'=>array(       //some stuff    ),    '#attributes' => array(      'class' => array('class-name'),  //use css float left      //alternatively float left using style in area      ),    ),    'col2'=>array(      '#type'=>'container',      'subitema'=>array(         //some stuff      ),      'subitemb'=>array(         //some stuff      ),      '#attributes' => array(        'class' => array('class-name'),  //use css float left        //alternatively float left using style in area        //note: still float left, divs align 2 columns unless        //screen space small, stack responsively.      ),    ), ); 

hope helps.