1) -------------------------------------------------------------------------------------
After trying to run the script:

default
{
    state_entry()
    {
        llSay( 0, "Hello, Avatar!");
    }

    touch_start(integer total_number)
    {
        llSay( 0, "Touched.");
    }
}

- Everything works fine, and the prim says "Hello, Avatar!" when I drag the script over it, and "Touched." when I click or 

select Touch on it.

2) -------------------------------------------------------------------------------------
After trying to run the script:

integer counter;

default
{
    state_entry()
    {
        llSay( 0, "Hello, Avatar! Touch to change color and size.");
        counter = 0;
    }

    touch_start(integer total_number)
    {   // do these instructions when the object is touched.
        counter = counter + 1;

        // choose three random RGB color components between 0. and 1.0.
        float redness = llFrand( 1.0 );
        float greenness = llFrand( 1.0 );
        float blueness = llFrand( 1.0 );

        // combine color components into a vector and use that vector
        // to set object color.
        vector prim_color = < redness, greenness, blueness >;
        llSetColor( prim_color, ALL_SIDES );   // set object color to new color.

        // choose a random number between 0. and 10. for use as a scale factor.
        float new_scale = llFrand(10.0) + 1.0;
        llSetScale(< new_scale, new_scale, new_scale > ); // set object scale.        
        llSay( 0, "Touched by angel number " + (string)counter);
    }
}

I get:

- "Hello, Avatar! Touch to change color and size." When I drag the script over the prim;

- "Error executing script function "touch_start":Command not implemented: llSetColorException has been thrown by the target 

of an invocation." When I click the prim.

- The prim doesn't change either it's color nor shape.

3) -------------------------------------------------------------------------------------
After trying to run the script:

default
{
    touch_start(integer total_number)
    {
        llSetScale(<5,5,5>);
    }
}

- The prim doesn't either resize, either give me a "Command not implemented" message, and just does nothing when touched.

4) -------------------------------------------------------------------------------------
After trying to run the script:

default
{
    touch_start(integer total_number)
    {
        llSetPrimitiveParams([PRIM_PHANTOM, TRUE]);
    }
}

I get:

- "Primitive: Error compiling script:Line number 5, Error Number: CS0103, 'The name 'List' does not exist in the current 

context'
" When I drag the script over the prim;

- Nothing when I click the prim.